## The World Wide Web — key aspects

- HyperText Information System
- Cross-Platform and Cross-Device ...then and now
- Distributed
  - 271 million unique domains, 198 million active sites, and 12 million "web-facing" computers
    (Netcraft Web Server Survey, August 2022)
- Open Standards
  - HTML, CSS, JavaScript, HTTP, networking
- Open Source
  - Browsers and engines (Chromium, Webkit, Mozilla),
    languages (PHP, Python),
    server software (Apache, nginx, WordPress)
- Web Browser: provides a single interface to many services
  - Information, Shopping, Banking and Finance, Communication, Business workflows, etc.
- Dynamic, Interactive, Evolving