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AT advanced technology
(en)
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AT acceptance testing
(en)
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ATA advanced technology attachment (PC)
(en)
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ATA analog telephone adapter
(en)
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ATAPI AT attachment packet interface (PC)
(en)
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ATB all trunks busy
(en)
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ATC ancillary time code
(en)
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ATCA advanced telecom computing architecture
(en)
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ATCP AppleTalk control protocol
(en)
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ATCXO analog temperature compensated crystal oscillator
(en)
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ATD asynchronous time division
(en)
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ATEX atmosphère explosibles
(en)
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ATIM announcement traffic indication message (802.11)
(en)
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ATIP absolute time in pregroove (CD)
(en)
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ATL ATLAS transformation language
(en)
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ATL automated tape library
(en)
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ATL ATM layer
(en)
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ATM automated teller machine
(en)
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ATM asynchronous transfer mode
(en)
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ATMF ATM forum
(en)
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ATO assemble to order
(en)
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ATO approval to operate (management)
(en)
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ATP adaptive tolerant protocol (modem)
(en)
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ATP ALPS tunneling protocol
(en)
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ATP AppleTalk transaction protocol
(en)
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ATPG automated test pattern generation (test system)
(en)
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ATR audio tape recorder
(en)
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ATR answer to reset (chipcard)
(en)
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ATRAC adaptive transform acoustic coding
(en)
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ATS abstract test suite
(en)
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ATSC advanced television systems committee
(en)
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ATSC-M/H advanced television systems committee (mobile TV)
(en)
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ATT attenuation
(en)
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ATT attribute protocol (IPSP, Bluetooth)
(en)
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ATU ADSL transceiver unit
(en)
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ATU-C ADSL transceiver unit central office
(en)
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ATU-R ADSL transceiver unit remote
(en)
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ATVEF advanced television enhancement forum
(en)
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ATX AT extended (Motherboard)
(en)
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