Lecture Notes – Aug 30th

Harvey … !!!

Questions on homework due Friday?
Quiz on Monday … review Lecture notes froths week
Review of Monday’s material
Class projects … service learning projects
- Hannah’s House
- Children’s Dispensary
- Others …
- Serving Learning credit
The World Wide Web (WWW)
- Inventor: Sir Timothy John Berners-Lee (1989)
- WWW not invented from scratch
  - Assembled by adapting and borrowing from six existing technologies and concepts
    1. Internet/TCP/IP, networking, protocols: ftp, gopher, telnet
    2. Client-server architecture
    3. Addresses, domain names, TCP ports – access methods – URI – URN -> URLs
    4. SGML – Markup -> HTML
    5. Hypertext – non-linear documents – hyperlinks -> HTTP
    6. Email/MIME (multipurpose internet mail extensions) – connectionless/stateless sessions
      1. Document header
      2. Document body
- Standards/Specifications (see edit)
  - World Wide Web Consortium (W3C)
    - https://www.w3.org
  - Internet Engineering Task Force (IETF)
    - http://ietf.org
  - Uniform Resource Locators (URLs)
  - Hypertext Markup Language (HTML)
  - Cascading Style Sheets (CSS)
  - JavaScript
    - ECMAScript
    - ISO/IEC
  - Hypertext Transfer Protocol (HTTP)
  - Document Object Model (DOM)
- Implementations