Introduction
You face a world where computers connect everything from banking to entertainment, yet you may feel overwhelmed by confusing terminology, privacy risks, and technical setup. The sheer scale of global networks makes it difficult to know where to start or how to keep your personal data safe from emerging threats. You want to use email, browse the web, and shop securely without needing a degree in computer science.
The Internet is a vast global system of interconnected networks that you can easily navigate and master once you understand the basic hardware, security rules, and communication tools.
John R. Levine wrote The Internet For Dummies to demystify this digital universe for everyday users. The book guides you through the process of choosing the right equipment, setting up home networks, and protecting your devices against malicious software. You learn how to surf the World Wide Web efficiently, send messages, and participate in social networks without falling victim to online scams.
The chapters take you step by step from basic concepts to advanced online activities. You discover how to stream media, conduct banking safely, and find reliable information using modern search tools. The book answers the practical questions you face every day:
- How do you connect your devices and secure your home network?
- What separates safe websites from dangerous phishing traps?
- How do you manage your email and organize digital correspondence?
- Where can you find reliable news, entertainment, and shopping platforms?
Reading this book gives you the confidence to explore online spaces productively. You learn the rules of the digital road and gain the technical literacy required to make the most of modern connected technology.
1. What Is the Internet
The Internet functions as a global network of networks connecting independent devices through standardized protocols.
Unlike broadcast television which sends identical information everywhere simultaneously, computer networks route specific messages to particular computers. You can communicate with any other connected device because the system permits true two-way communication. As an Internaut, you navigate the world's largest computer network every time you go online.
John built a small network in his back bedroom from a couple of old PCs bought at an electronics parts store.
Network of Networks
The Internet originated from ARPANET, a project funded by the Department of Defense in 1969 for reliable networking among military research contractors and universities. The Advanced Research Projects Administration initially connected three computers in California with one in Utah before growing into the early Internet in the 1980s under National Science Foundation funding. By 1990, government agencies stepped aside in favor of commercially run networks operated by companies like AT&T, Comcast, and Verizon.
Core Internet Services
Millions of people rely on the Big Three online services every day:
- electronic mail for written communication and mailing lists;
- the World Wide Web for a global multimedia hyperlinked database navigated via browsers;
- instant messaging for real-time pop-up text conversations.
Nimble-fingered youth are reported carrying on upward of 13 instant messaging sessions simultaneously.
Cloud Computing
Cloud computing uses virtualization technology to allow superfast physical servers to run multiple independent virtual servers dynamically on demand. This approach builds on techniques first invented by IBM researchers in 1967, which mainframe computers have used for four decades. Virtualization allows data centers to start and stop virtual servers as needed to balance loads across different geographic regions and time zones.
John uses Amazon cloud services with data near Seattle, while Margy manages www.uua.org hosted in a cloud over Virginia.
2. Internet Safety and Threats
Connecting a computer to the Internet makes it vulnerable to malware, phishing, and tracking unless protected by proper security.
Malicious software programs like viruses and worms infect systems by spreading through email attachments or exploiting network security flaws. Viruses require execution to spread copies via address books and execute payloads that log keystrokes or send spam. Worms propagate automatically over the network by exploiting vulnerabilities in operating systems like Microsoft Windows. A fresh Windows machine on a broadband connection can be overrun with worms in less than a minute.
Phishing and Privacy
Phishing scams use realistic fraudulent emails and spoofed websites to trick users into divulging sensitive personal and financial information. Victims receive urgent warnings prompting them to click a link that leads to a fake sign-in page designed to harvest passwords, credit card numbers, Social Security numbers, and other confidential data for identity theft. Websites and advertisers also utilize cookies and web bugs to track user behavior across pages, build profiles, and target advertisements.
An email falsely claiming to be from the eBay Safeharbor Department threatens account suspension unless the user clicks a numeric link and verifies registration information. The fake warning message gives a 48 hours deadline to create panic, while utilizing a 00937614 fraudulent alert ID code.
Junk Email and Spam
Unsolicited bulk email imposes substantial financial and resource burdens on recipients, email servers, and internet service providers. Because sending millions of messages via email costs spammers virtually nothing, spam has proliferated to comprise the vast majority of incoming email traffic.
Large ISPs estimate that spam creates serious resource strains:
- 20 times the amount of real email represented by current spam volume;
- 95 percent or more of incoming email estimated by large ISPs to be spam;
- 2 dollars of monthly user fees estimated by ISPs to go toward cleaning up spam;
- 100 billion spam messages sent every day.
3. Children and the Internet
Children benefit from powerful educational resources online, but parents must establish firm boundaries to prevent safety risks.
The Internet offers kids powerful educational resources, collaboration tools, and creative outlets. At the same time, it exposes them to plagiarism, bullying, exploitation, and inappropriate content.
Your child can conduct homework research, participate in global school projects, and practice foreign languages. Unmonitored access risks severe dangers like targeted corporate marketing, online predators, and inappropriate commercial file sharing.
Global Schoolhouse cyber fairs have brought together over 500,000 students from hundreds of schools across at least 37 countries.
Educational Benefits
Children find vast research materials and cooperative learning spaces across the globe. COPPA rules protect young users from unlawful data collection by commercial websites.
You should encourage constructive activities:
- completing homework research;
- collaborating on global school projects;
- practicing foreign languages.
Parental Guidelines
Experts advise against placing computers in bedrooms or giving young children unrestricted screen time. You should foster real-world social skills and safeguard family security by managing household digital access.
The authors recommend specific boundaries for your home:
- keep computers in public family areas;
- store smartphones in parents' rooms for overnight charging;
- enforce regular screen-free days;
- limit screen time for children under age 5 who benefit more from physical play.
4. Assembling Your Gear
Accessing the internet requires selecting reliable hardware, broadband connections, and robust system security defenses.
High-speed broadband connections provide fast, always-on internet access. You will usually require a modem and a wired or wireless network adapter to get online.
Broadband Connections
Broadband offers download speeds often exceeding 10 million bits per second. Basic starting costs for high-speed cable or DSL hover around $30 per month. Both options commonly bundle with phone and television services.
You can choose between two main infrastructure types:
- Digital Subscriber Line (DSL) utilizes existing telephone lines;
- cable accounts leverage television cable infrastructure.
Basic DSL service operates at speeds starting at 640 Kbps. Renting a cable modem typically costs $5 per month, while buying one outright costs around $90.
System Protection
Computers connected to the internet require active antivirus and antispyware programs to block malicious software. You need to keep these definitions frequently updated to fend off emerging online threats.
Operating systems like Windows 8.1 include built-in tools such as Windows Defender. If you use older versions, you can download free tools like Microsoft Security Essentials. Additional antispyware programs like Malwarebytes Anti-Malware help sweep your hard disk for hidden tracking programs.
Firewalls act as a protective barrier between a computer and the internet to monitor incoming and outgoing traffic. You can secure your system using built-in software firewalls available in operating systems like Windows and macOS. Alternatively, you can buy a standalone hardware router for approximately $40, which maintains continuous firewall protection.
5. Setting Up Networks
Home users can share a single broadband connection across multiple devices by configuring a local-area network through a hardware router.
A local-area network, or LAN, connects computers within one building using cables or wireless signals. A hardware router combines a hub or access point with internet-connection smarts like a firewall. This device allows all connected devices to access the web simultaneously without individual connections.
A visionary friend of the authors predicted small, cheap computers everywhere. This prediction has led many households to accumulate multiple old machines that can be networked together.
Buying your own networking gear saves money over time. Internet service providers often charge a rental fee of $5/month for a modem or router. You can instead buy a modem or router at a big box store for an average cost of $75. Typical hardware routers cost from $40 to $80.
Home LAN Architecture
Because routers have no display, you configure them through a web browser. You connect a computer via an Ethernet cable using a Cat 5 cable and an RJ-45 jack. Then you type the router's numeric private network address into a web browser.
Common router configuration web addresses include:
- 192.168.0.1
- 192.168.0.254
- 10.0.0.1
This control page allows you to enter broadband login credentials and manage Wi-Fi settings. Some connections require authentication protocols such as PPPoE.
Wireless Security
Wireless networks require passwords to prevent unauthorized access, data snooping, and bandwidth theft by outsiders. Unprotected wireless access points allow passersby to engage in wardriving. This practice lets strangers access shared files, printers, and internet connections.
Encryption protocols protect networks by requiring passwords. Older WEP and stronger WPA methods secure traffic differently, with WPA offering much stronger security. When using WEP, password sizes depend on key lengths:
- 64 bits requires a text length of 7 characters
- 128 bits requires a text length of 13 characters
You can also use Wi-Fi Protected Setup, known as WPS, to connect devices securely.
6. Welcome to the Web
The World Wide Web operates as an information system on top of the Internet using linked pages and browsers.
The web is an information system operating on top of the Internet. It utilizes linked pages, standardized protocols, and unique addresses to connect millions of resources globally. You navigate this space using software applications that fetch and display content.
Web Origins
The web was invented in 1989 at CERN. Sir Tim Berners-Lee created HTTP for browser-server communication, HTML for page formatting, and URLs for global resource addressing. He published Weaving the Web in 1999 and was knighted in 2004.
Margy met Sir Tim Berners-Lee when he played the part of an amoeba in a church pageant. He also appeared in the opening ceremony for the London Olympics in 2012.
Every web resource is located via a Uniform Resource Locator structured with an access scheme, a host computer name, and an optional file path. You can identify these elements by examining the address bar. Top-level domains indicate the type of organization operating the site.
- ICANN required an application fee of $185,000 to propose new generic top-level domains.
- Applicants submitted 1,900 proposals for new top-level domains.
- The standard HTTP port number is 80.
Web Browsers
Web browsers fetch and display web pages. Different options vary in speed, security features, and platform availability. Major browsers include Firefox, Google Chrome, Internet Explorer, and Safari.
Experts recommend modern browsers like Firefox or Chrome over Internet Explorer due to better speed and superior protection against spyware. You can choose from several dominant platforms:
- Google Chrome holds approximately 60 percent market share.
- Firefox maintains an approximate 24 percent market share.
- Internet Explorer commands an approximate and declining 10 percent market share.
7. Taking Your Browser for a Spin
Modern web browsers provide advanced features for managing bookmarks, passwords, cookies, and secure form submissions.
Managing Bookmarks
Browsers allow you to store and organize frequently visited web addresses to avoid retyping URLs. Different browsers use different terms for this feature:
- bookmarks in Firefox, Chrome, and Safari;
- favorites in Internet Explorer.
You can organize these saved links into custom folders, use a Library window, or place them on a Bookmarks toolbar for one-click access. Firefox developers include the Latest Headlines bookmark which displays breaking news stories from the BBC website.
Web pages often use forms to collect your input before submission. These forms use text boxes, check boxes, radio buttons, and list boxes to gather information. Secure pages display a padlock icon, meaning data entered in forms is encrypted during transit.
Password and Cookie Control
When logging into an account, browsers offer to save credentials through AutoComplete to automatically fill them in during future visits. You can manage, view, or delete saved credentials through browser security settings or set a master password for added protection. Saving credentials poses a security risk on shared or public computers. Amazon and the New York Times require users to create an account with a username and password to store account preferences and payment details.
Cookies are messages stored on a computer by websites to recognize returning visitors. Some web sites can store three or more cookies per page, including session cookies. You can configure cookie policies to accept primary site cookies while blocking third-party cookies used for tracking and advertising. You can also view, manage, or remove stored cookies manually.
8. Sending and Receiving Email
Email relies on mail servers and protocols like IMAP and POP to transmit messages across personal and professional accounts.
An email address consists of a username and a domain separated by the at-sign, where the domain indicates the location of the mailbox. The part before the @ symbol is the personal username or mailbox, and the part after is the domain. Domains can be hosted by internet service providers, schools or employers, custom personal domains, or web-based email services.
The president of the United States can be reached at president@whitehouse.gov.
Web-based email services store mailboxes on website servers, allowing users to access messages from any web-connected browser without needing a dedicated mail program. Webmail is accessible from public computers, cybercafés, or mobile browsers by logging in with a password. Signing up for major webmail accounts often grants access to integrated tools like online storage, calendars, and office applications.
Google provides Gmail along with Google Calendar and Google Drive, while Microsoft provides Outlook.com along with OneDrive and online Office apps. About 20 years ago, the first two webmail systems were created.
Mail Servers
IMAP stores all mail folders on the server so they can be synchronized across multiple devices, whereas POP downloads messages to a single computer and deletes them from the server. Using an IMAP server allows you to see the exact same set of mailboxes regardless of whether you log in from a phone, work computer, or home laptop. POP is simpler but keeps saved messages isolated to the specific machine where they were downloaded.
Mail folders face different storage constraints:
- 1 or 2 megabytes is a storage limit size that is considered very tight for an ISP mail folder.
- 100 megabytes is a storage limit size that is normally plenty for text-based email folders unless dealing with video files.
Email programs rely on a dedicated outgoing mail server using the Simple Mail Transfer Protocol to transmit sent messages. While incoming mail servers receive and hold messages until retrieved, outgoing servers handle the transmission of messages composed by you. Desktop programs require proper configuration of both incoming and outgoing server addresses.
Gmail uses smtp.gmail.com on port 587, and Outlook.com uses smtp.live.com on port 587 for outgoing mail. The network port used for Gmail and Outlook.com POP servers is 995.
9. Putting Your Mail in Its Place
Effective email management requires spam filtering, adherence to etiquette rules, and careful handling of attachments.
Email Etiquette
Email acts as a hybrid between a phone call and a letter. The medium lacks facial expressions or tone of voice, which makes subtlety risky and aggressive replies harmful.
You should avoid typing in all capital letters because it simulates shouting. Sarcasm or irony rarely translates well in writing. Pointless outrage is called flaming.
- Wait until after lunch before responding to obnoxious messages to avoid regret.
- Remember lessons learned from 30 years of using email.
Spam Filtering and Attachments
Upward of 90 percent of all mail is spam, forcing providers to filter out ten spam messages for every message it delivers. Systems like Gmail, Outlook.com, Outlook, and Apple Mail make it simple to manage unwanted deliveries.
You can handle junk mail and files using straightforward actions:
- mark or right-click messages as junk;
- block or whitelist senders and domains;
- review junk folders to rescue erroneously caught ham.
Files can be attached to emails or shared via external websites when they exceed standard size limits. You can drag and drop files into messages or use paper clip icons to attach images, documents, or compressed files. Certain attachments like executable files can carry malware and require verification.
A 4MB typical size limit for email messages including attachments often restricts large transfers. If files are too large for mail system limits, you can rely on file transfer websites like dropbox.com or WeTransfer.com, video-sharing sites, or cloud storage like Google Drive and OneDrive. WeTransfer allows up to 2GB of files to the website with a two weeks storage duration on WeTransfer.
10. Social Networking
Social networking sites allow you to build personal profiles, connect with contacts, and join platforms tailored to specific audiences like professional networking. Facebook dominates the user base with more than 700 million people. Other platforms like MySpace, Google+, Ello, and professional networks like LinkedIn serve distinct communities and purposes. You should select networks based on where your colleagues and friends are active. Google+ arrived with its early 2011 introduction.
Social Landscapes
Facebook enables you to create profiles or organizational pages, find real-life acquaintances via address books or search bars, and organize connections into groups. After signing up with basic information and confirming registration via email, you can upload photos and connect with friends. Profiles can be organized into customized lists or groups to manage sharing and visibility.
Organizations can establish pages where supporters become fans.
- Use a profile for an individual person.
- Create a page for a business or organization.
- Connect with friends using real names.
- Organize contacts into Close Friends and Acquaintances.
Facebook enforces a 13 or older age restriction.
Facebook and Privacy
Social networking platforms allow users to build personal profiles, connect with acquaintances, and control post visibility.
You can control post visibility through granular privacy settings and stay updated via the News Feed, while also managing unwanted posts or connections. Privacy settings allow you to restrict who sees updates, photos, or friend lists. The author notes that third-party sharing and data tracking by advertisers remain concerns.
The News Feed displays chronological updates from connections. You can modify your view when contacts become intrusive.
- Unfollow contacts to stop seeing their posts without removing them.
- Unfriend contacts to sever the connection entirely.
You can join groups to share common interests with other users.
11. Microblogging with Twitter
Twitter is a micro-blog service that lets you post short public updates. Each message is called a tweet and is limited to a maximum of 140 characters.
You create an account with a unique handle. With 175 million accounts already registered, finding an available name requires patience. Your short posts can be read by anyone following you or viewed on your public web page.
Twitter enables microblogging through short public updates, hashtags, and customized lists for following trending topics.
Twitter Basics
Rather than checking individual profile pages, you see a combined list of posts from everyone you follow on your home page. You can follow popular accounts like President Barack Obama, pop star LadyGaga, politician SenWarren, or the fictional character Lord Voldemort.
The service utilizes specific punctuation marks to organize content and direct messages. You can direct tweets or reference other users with distinct syntax rules.
- Use an at-sign placed in front of a username to mention someone, such as @BarackObama.
- Use a hash mark to indicate a searchable keyword or topic.
Tags and Lists
Searching and clicking on popular hashtags help you discover current topics. Trending hashtags aggregate global discussions around specific events or ideas like #green.
As the volume of followed accounts grows, the stream of information becomes overwhelming. You can create custom public or private lists to group and monitor specific sets of people.
- Create a private list to monitor accounts without making your selections public.
- Build a public list named My Friends for close acquaintances or organize Favorite Mystery Authors.
12. Typing and Talking Online
Cell phone text messages differ fundamentally from Internet messaging services. SMS messages go directly from cell phone to cell phone through carrier networks, traditionally carry a 140-character limit, and may incur per-message fees depending on the cellular contract. Internet-based chat services operate over a data plan, have no character limit, and avoid carrier per-message fees.
Computers can transmit high-quality voice and video communications globally over the Internet without traditional toll charges.
Instant Messaging
Text chat programs let you communicate in real time across networks. You can converse with individuals or groups without paying extra fees per transmission.
Internet Voice and Video
Using microphones, webcams, and software applications, you can make voice calls and video chats. Voice quality is typically superior to standard telephone connections, while video performance depends heavily on computer processing speed and Internet connection bandwidth.
Equipment costs vary based on your hardware choices:
- A basic computer microphone costs about 20 dollars.
- External webcams range from 30 to 100 dollars.
- Margy and John successfully used a specific external webcam that cost 36 dollars.
John once placed a call home using his laptop over a hotel Wi-Fi connection in Argentina for just 2 cents rather than paying a dollar a minute from a pay phone. You can use services like Skype, SkypeOut, SkypeIn, Google Hangouts, and Viber to place calls. Calling Europe using Skype Out costs approximately 2 cents per minute.
Reddit organizes discussions into specialized subreddits where user votes determine content visibility. Users post links or text entries, and community members upvote or downvote submissions and comments. Highly rated items rise to the top of the page based on community consensus, generating Reddit karma for active participants. Specific popular subreddits include Today I Learned (TIL), I Am A (IAMA) for question-and-answer sessions, and WTF for astounding web finds.
Email mailing lists distribute running public discussions and announcements to groups of subscribers via a central address. Messages sent to a list address are automatically forwarded to all subscribers, enabling group conversations. Mailing list managers like LISTSERV, Mailman, and Majordomo handle the traffic. Lists can operate as open discussion forums, moderated environments where a human reviews posts, or announcement-only newsletters managed by automated software. You can also receive busy conversations as digested mailing lists to reduce inbox clutter. Margy's work utilizes a private messaging system called HipChat that is based on the Jabber standard.
13. Finding Information Online
Web directories are organized by human catalogers into categories like a library. Search engines use automated software to index and rank billions of web pages by relevance. Directories offer structured terminology and fewer useless pages. Search engines provide comprehensive indices using keywords and incoming links. Yahoo! includes both a directory and a search engine. Google is primarily a search engine that incorporates a version of the Open Directory Project.
Search engines use automated software robots to index and rank billions of web pages by relevance to user keyword queries.
Search Mechanics
Google uses software robots called spiders to index web pages. Sophisticated algorithms rank pages by prioritizing sites based on external references. A search for key lime pie yields 1,130,000 matches found in a key lime pie search. Results appear as 100 matches shown at a time, 10 per screen. You can spot sponsored links and Google doodles on the page, or click the I'm Feeling Lucky button to go straight to the top result.
You can refine searches using specific operators:
- quotation marks for exact phrases;
- plus or minus signs to include or exclude terms;
- the site operator to restrict results to a specific domain.
Searching for key lime pie yields numerous results. You can narrow them down by adding the keyword recipe.
Reference Tools
Wikipedia is a free, volunteer-edited online encyclopedia that serves as a fast and comprehensive starting point for factual queries. The English edition contains 3 million articles in English. Hundreds of thousands of active contributors maintain the text, with 300,000 active contributors currently participating. Articles strive for a neutral point of view known as NPOV. A wiki allows anyone to edit pages directly through a web browser. Contributors revert inappropriate edits to ensure high overall quality.
The article on Key lime pie notes that it uses canned sweetened condensed milk because fresh milk was unavailable in the Florida Keys before modern refrigeration.
14. Music and Video on the Web
Broadband speeds enable media streaming, digital music organization, and video sharing across global platforms.
Music Ripping and Streaming
Music Ripping and Streaming
Broadband speeds enable media streaming, digital music organization, and video sharing across global platforms.
The process of copying tracks from an audio CD to a computer hard drive is called ripping. Programs like iTunes let users organize songs into custom playlists without duplicating the underlying audio files. Margy uses one playlist for her women's barbershop group, Maiden Vermont, and another for working.
Early services like Napster allowed peer-to-peer sharing of MP3 files, leading to lawsuits and shutdowns by record labels. Later systems like BitTorrent and LimeWire faced similar scrutiny, though BitTorrent is also used for legal distributions. The recording industry sued prominent music sharers and attempted to introduce the Secure Digital Music Initiative, which flopped.
Services like Rhapsody, Spotify, Netflix, and Amazon Prime offer huge catalogs of music and video on demand. The media vanishes if the user stops paying the subscription fee. Specific subscription options include:
- $10 a month for Spotify premium
- $5 a month for Spotify student premium
- $99 a year for Amazon Prime
The authors used Rhapsody to compare Desi Arnaz's late-1940s version of Babalu with Xavier Cugat's 1941 recording.
Video Sharing
Video-sharing platforms like YouTube enable users worldwide to upload, stream, and share massive quantities of video content. YouTube embeds video-playing software directly into its website, allowing users to watch clips without separate player applications. Uploading requires compliance with copyright and content rules. The New York Times reported that users post more than 100 million videos on YouTube daily.
Platform statistics highlight the scale of modern video consumption:
- 48 hours of video uploaded every minute
- 3 billion video views every day
- 10 minutes maximum video length for uploads under standard guidelines
15. More Shopping and Banking
Online shopping offers unmatched convenience, round-the-clock availability, and better access to hard-to-find items, but it sacrifices physical inspection and local store support.
Online stores ship directly from warehouses rather than limited shelf space, making rare items accessible. You cannot physically try on items like clothes or engage in local interactions when ordering online. Margy could not find a harmonium anywhere in the Champlain Valley and had to rely on online shopping.
Using credit cards online is relatively safe compared to physical restaurants, and cookies are helpful shopping tools rather than malicious spying devices. Physical credit card processing at restaurants carries higher risks of misuse than secure online transmission. Cookies are small text snippets used by browsers to track shopping carts and retain session data. A friend who ran both a restaurant and an online store assured the authors that the online store had none of the credit card problems the restaurant did.
Online marketplaces like eBay and Craigslist present specific scam risks that deviate from normal transaction protocols. Scammers exploit remote transactions through fake nonresident landlord listings and large cashier's check overpayment schemes. A buyer sends a $1,000 cashier's check for a $100 item and asks the seller to wire back $850 after depositing it, before the forged check bounces. The extra $50 is left for your trouble, while other scams offer an absurdly low price like $20 for a fake iPhone.
Online Banking and Payments
Online banking relies on Automated Clearing House transfers to move money between accounts faster and more reliably than paper checks.
Paper checks have been the traditional way to move money in the US for about 150 years. ACH transfers utilize a bank's nine-digit routing number and account number to handle transactions like direct payroll deposits, government benefits, and bill payments. John uses his bank's online interface to check statements, export history into Quicken, and view images of canceled checks. You can challenge bogus transactions just like forged checks to recover your funds if unauthorized withdrawals occur.
PayPal and peer-to-peer payment networks enable individuals to easily transfer money, pay international fees, and split expenses using email addresses or mobile apps. PayPal links directly to bank accounts and credit cards to facilitate merchant transactions and peer transfers, utilizing small verification deposits for setup. Peer services function as digital wallets for casual expenses while charging specific transaction fees:
- a 3 percent typical fee for PayPal payments not marked as Personal or when using a credit card
- a fee of 25 cents for Dwolla payments over $10
16. Worthwhile Online Activities
Users can contribute to charitable causes, digitize historical books, and donate idle computing power to scientific research.
Charitable Platforms
The internet connects you to global philanthropy without requiring large donations. You can turn routine web browsing into food relief or direct financial support for individuals in developing nations. Free Rice donates ten grains of rice for every correct answer given on freerice.com. You answer vocabulary questions starting at Level 1, combining education with international charity.
Online platforms enable individuals to act as microfinance lenders by providing small loans to entrepreneurs in developing regions. You can support projects like sewing businesses or fish markets starting with small monetary amounts.
- Kiva lets users become microfinance lenders in Latin America, Africa, and Asia with loans starting at $25
- Heifer International provides livestock shares starting at $10 for a goat or pig, up to $500 for a heifer
Users help digitize historical books and newspapers every time they solve a two-word CAPTCHA challenge. The reCAPTCHA project uses automated tests that require humans to decode blurry scanned words from old texts that automatic scanners cannot recognize. Carnegie-Mellon University's reCAPTCHA project displays about 30 million CAPTCHAs per day across thousands of websites worldwide.
Distributed Computing
Internet-connected home and office computers can donate their idle time to run massive calculations for scientific research. Projects utilize idle processing power to analyze radio signals for extraterrestrial intelligence, study protein folding to find disease cures, or solve complex mathematical problems. SETI@home extracts radio signals using data from the Arecibo radio telescope in Puerto Rico. Folding at Home studies protein shapes to research cures for cancer and Alzheimer's. You simply install a background program that operates only when your system has spare processing capacity.
10 Key Ideas
- The Internet functions as a global network of networks connecting independent devices through standardized protocols.
- Connecting a computer to the internet makes it vulnerable to malware, phishing, and tracking unless protected by proper security.
- Modern web browsers provide advanced features for managing bookmarks, passwords, cookies, and secure form submissions.
- Email relies on mail servers and protocols like IMAP and POP to transmit messages across personal and professional accounts.
- Social networking platforms allow users to build personal profiles, connect with acquaintances, and control post visibility.
- Twitter enables microblogging through short public updates, hashtags, and customized lists for following trending topics.
- Computers can transmit high-quality voice and video communications globally over the Internet without traditional toll charges.
- Search engines use automated software robots to index and rank billions of web pages by relevance to user keyword queries.
- Broadband speeds enable media streaming, digital music organization, and video sharing across global platforms.
- Online banking relies on Automated Clearing House transfers to move money between accounts faster and more reliably than paper checks.