ISP stands for Internet Service Provider. These are companies that provide internet-related services, such as email and high-speed internet. The top ISPs in North America are:
- Yahoo
- Windows Live Mail (Hotmail/MSN)
- AOL
- Gmail
- AT&T (att.net, bellsouth.net, sbcglobal.net)
- Comcast
- Verizon
- Cox
- Road Runner
- USA.net