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| German | English |
| AT-Befehlssatz | AT instruction set (modem control instructions: each instruction is preceded by AT = attention, Hayes) |
| AT-Befehlssatz | asynchronous transfer command set |
| AT-Befehlssatz | AT command set |
| AT-Bus | AT bus (IBM PC bus standard, now called ISA bus, q.v.) |
| AT-Busschnittstelle | AT bus interface (also called IDE, q.v., PC) |
| AT-PC | AT PC (PC with Intel 80286/386 processor) |