- Calling, Paging, & Signaling-Equipment & Systems
- Communications Consultants
- International Call-Service Provider
- Mobile Telephones & Acessories
- Radio & Electronic Equipment-Aviation & Marine
- Radio & Television Broadcasting Equipment & Supplies
- Radio Communication Equipment
- Radio Communication Equipment & Systems
- Radio Paging & Signaling-Common Carrier Service
- Radio Program Producers & Distributors
- Telecommunication-Systems-Service & Consultants
- Telecommunications-Equipment & Supplies
- Telephone Answering Service
- Telephone Apparatus
- Telephone Booths
- Telephone Companies
- Telephone Equipment & Systems
- Television & Radio Supplies & Parts-Wholesale & Manufacturers
- Television & Radio-Dealers-Used-Bought & Sold
- Television & Radio-Wholesale & Manufacturers
- Television Films-Producers & Distributors
- Television News Agencies
- Television Station Equipment
- Television Station Representatives
- Television Studio Equipment
- Television Systems & Equipment-Closed Circuit
- CCTV
- Computer Consultants
- Computer Software Service
- Computer-Data Networking Service
- Computer-Used
- Computers
- Computers And CD-ROM Manufacturers
- Computers Peripherals & Accessories-Dealers
- Computers Peripherals & Accessories-Repairing
- Computers-Equipment & Supplies
- Computers-Renting & Leasing
- Game-Play Station & Software
- Note Book & Camera Bag
