- Simplicity:
    Keep it simple
 
  - Modular Design
 
  - Tolerance:
    Be liberal in what you require but conservative in what you do
 
  - Decentralization:
    distributed systems 
from Principles
of Design, Tim Berners-Lee, September 1998
  - Uniform Resource Identifiers
 
  - HTML (now XML)
 
  - HTTP