Three areas:
User interface
(
HTML
,
style
,
graphics
,
fonts
,
internationalization
,
SGML & XML
)
Architecture
(
HTTP
,
URL
,
Real-time A/V
,
Dynamic objects
,
Replication
)
Technology and society
(
PICS
,
Disabilities
,
E-commerce
,
Privacy & demographics
,
Security
)