21 CBAA-- Community Broadcasting Association of Australia
22 CCA--Cable Communication Association 电缆通信协会
23 CGS--MIT Computer Graphics Society美国麻省理工学院MIT计算机图象学会
24 CMA-- Communications Manager Association 通信管理者协会
25 CompTel-- Competitive Telecommunications Association
26 CTIA--Cellular Teleommunications Industry Association 蜂窝电信工业协会
27 IEE--Institution of Electrical Engineers(UK) （英国）IEE学会
28 IEEE--The Institute of Electrical and Electronics Engineers IEEE学会
29 IEEE Aerospace and Electronic Systems Society IEEE航天与电子系统学会
30 IEEE Antenna and Propagation Society IEEE天线与电波传播学会