1. Computers, The Internet & The Web Jacie Yang Texas State University

2. Computers

3. Hardware – Motherboard – Graphic Card – CPU (Central Processing Unit) – RAM (Random Access Memory) – Hard drive – CD/DVD drive Operating Systems Software

4. Operating Systems Windows (PC) – Windows XP – Windows Vista – Windows 7 Mac OS – Classic Mac OS – Mac OS X Linux OS Market Share

5. Display Pixel – Smallest addressable screen element – Also a unit for image dimensions Screen display – Lower than 1024x768 – 1024x768 – Higher than 1024x768 – Screen display market share Screen display market share

6. Files File size – 1 bit= 0 or 1 – 1 byte= 8 bits – 1KB= 1024 bytes (1024=2 10 ) – 1MB= 1024MB – 1GB= 1024MB – 1TB= 1024GB So, do you need a 32G iPhone or a 64G iPhone?

7. Internet=Web?

8. The Internet

9. Defining the Internet The Internet is a global system of interconnected computer networks that use the standard Internet Protocol Suite (TCP/IP) to serve billions of users worldwide (Wikipedia). An electronic communications network that connects computer networks and organizational computer facilities around the world (Merriam-Webster).

10. History of the Internet In the 1960s (the Cold War) US government created Defense of Advanced Research Projects Agency (DARPA) US Military was concerned about survivability of their centralized communication networks First two nodes of the ARPANET – UCLA, School of Engineering & Applied Science – SRI International in Menlo Park CA

11. What Can You Do on the Internet? E-Mail (electronic mail) Instant Message (AOL, MSN Messenger, etc) BBS (Bulletin Board System) VOIP (Voice-over Internet Protocol) WebCam File sharing (FTP) Media Streaming (webcasts, podcasting) The Web

13. Defining the Web The Web: World Wide Web, or WWW. A system of interlinked hypertext documents accessed via the Internet (Wikipedia). A part of the Internet accessed through a graphical user interface and containing documents often connected by hyperlinks — called also Web (Merriam-Webster). The Web can only be accessed through Web browsers!

14. History of the Web 1989-1990 Tim Berners-Lee Built “Hypertext project” called WorldWideWeb. Creator of HTML (Hypertext Markup Language).

15. Mosaic: First Web Browser 1992-1993 Made the Web popular and accessible to the public. Later become Netscape (1994).

16. Web Browsers Internet Explorer (Microsoft, 1995) Opera (Opera Software,1996) Firefox (Mozilla Corporation, 2004) Safari (Apple, 2005) Chrome (Google, 2008) Timeline of Web Browsers Browsers Market Share

17. Web Browsers 2010/5/16

18. How does the Web work? URL: Uniform Resource Locator – i.e. http://www.txstate.edu http:// – Hypertext Transfer Protocol www – World Wide Web How does the Web work? WWW in Plain English

19. Multimedia on the Web Text Images Audio Video Let’s take a look at those elements on the Web.

20. Images on the Web JPG/JPEG (Joint Photographic Experts Group) – Supports true color – Is usually the file format of digital cameras GIF (Graphic Interchange Format) – 256 colors – Good for graphics with limited colors PNG (Portable Network Graphics) – Best when you have combination of photos and text

21. Audio and Video on the Web Popular audio formats: – MP3, ACC, WMA Popular video formats: – AIFF, WAV, MOV (QuickTime), MP4, RM Supports both audio and video: – ogg

22. Search Engines

23. Defining Search Engines A web search engine is designed to search for information on the World Wide Web (Wikipedia). Computer software used to search data (as text or a database) for specified information; also : a site on the World Wide Web that uses such software to locate key words in other sites (Merriam-Webster).

24. How Do Search Engines Work? How Search Engines Work Web Search Strategies

25. Popular Search Engines Search Engines – Google – Bing – Yahoo – Ask.com Meta-search engines – Ixquick – Clusty