HCO (Hearing Carry Over)

An offering of Telecommunications Relay Service (TRS) that allows a

person with a speech disability to use his or her own hearing to listen to the called party, but to respond in text through the call administrator (CA), who acts as a facilitator. See also TRS.

• high-cost area
• high definition television (HDTV)
• high density bipolar order 3 (HDB3)
• high frequency (HF)
• High-Level Data Link Control (HDLC)
• high-order mode
• high-pass filter
• High Performance Parallel Interface (HIPPI)
• high speed
• high-speed channel (H channel)
• High-Speed Circuit Switched Data (HSCSD)
• High Speed Downlink Packet Access (HSDPA)
• High Speed Uplink Packet Access (HSUPA)
• high-tier
• high voltage (HV)
• HiperACCESS (High performance radio ACCESS)
• HiperLAN/1 (High performance radio Local Area Network version 1)
• HiperLAN2 (High performance radio Local Area Network version 2)
• HiperMAN (High performance radio Metropolitan Area Network)
• HIPPI (HIgh Performance Parallel Interface)
• Hockham, George
• hold
• hold
• Holmes, E.T.
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