Joan/Eleanor

The code name for the first walkie talkie system, which comprised a ground unit, Joan,

and an airborne unit, Eleanor. The system allowed agents of the Office of Strategic Services (OSS), the predecessor to the Central Intelligence Agency (CIA), behind enemy lines to communicate with aircraft in a manner that virtually defied detection at the time. See also walkie talkie.

• cross-connect
• crossreed
• cross-talk
• crosstalk (XT)
• CRTC (Canadian Radio-television and Telecommunications Commission)
• cryptography
• cryptology
• crystal oscillator (XO)
• CSA (Carrier Serving Area)
• CS-ACELP (Conjugate Structure-Algebraic Code Excited Linear Prediction)
• CSA International
• CS (Convergence Sublayer)
• CSD (Circuit-Switched Data)
• CSLIP (Compressed Serial Line Internet Protocol)
• CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance)
• CSMA (Carrier Sense Multiple Access)
• CSMA (Carrier Sense Multiple Access)
• CSMA (Carrier Sense Multiple Access)
• CSMA/CD (Carrier Sense Multiple Access with Collision Detection)
• CSTA (Computer Supported Telephony Applications)
• CSU (Channel Service Unit)
• CSU/DSU (Channel Service Unit/Data Service Unit)
• CT0 (Cordless Telephony generation 1)
• CT1 (Cordless Telephony generation 1)
• CT1+ (Cordless Telephony generation 1 plus)