Arts
Business
Computing/Internet
Entertainment
House/Home
Investment
Language
Motorcycling
Organisations
People
Places
Reference
Search
Shops/Services
Sport/Recreation
Technology
Travel
Broadband
Computer games
Computer hardware manufacturers
Computer security
Domain names
Email mailing lists
Email providers
File storage and sharing
Hit counters
Internet advertising
Internet cafes & hotspots
Internet services
Internet standards
ISPs
Paid surfing
RFID & NFC
Software
Software engineering
Web design
Web development
Web hosting
Webcams
Chris's links : Computing/Internet : Email mailing lists
CoolList
provide free mailing lists
EGroups
provide free mailing lists (best I've found)
List of mailing list providers (Brian's)
List of mailing list providers (Vivian's)
ListBot