| Area Code Information |
| Exchange Name Project |
| New York City Exchange Names |
| North American Numbering Plan |
| World Telephone Numbering Guide | ||
| Boxes |
| Computer Incident Advisory Capability (CIAC) |
| Computer Virus Myths and Hoaxes |
| McAfee |
| Network Associates Virus Information Library |
| Symantec |
| ADSL Forum |
| The ADSL Technology Page |
| DSL Reports |
| Universal ADSL Working Group |
| xDSL.com |
| Dan Kegel's ISDN Page |
| The ISDN Page |
| The ISDN Zone |
| Fat Cow TCP/IP Tutorial |
| InterOperability Lab Tutorials on Technical Subjects |
| Telephone History Web Site |
| Tom Farley's Telephone History |
| CDMA Development Group |
| VOIP References |
| Techguide.Com |
| Web ProForum VoIP Tutorial | ||
| Protocols.Com--VOIP |
| Voice over IP |
| ATM Forum |
| ATM Link Web |
| Cisco ATM Tutorial |
| Web ProForum ATM Tutorial |
| InterOperability LAB ATM Tutorial |
| Fight Spam on the Internet |
| Coalition Against Unsolicited Commercial Email |
| Paul Hsieh's Antispam Page |
| SpamCop |
| Anti-Spam Home Page |
| Spam Laws |
| Snopes Urban Legend Page |