(Advanced Technology EXtended motherboard) The PC motherboard that superseded the Baby AT design. The ATX layout rotated the CPU and memory 90 degrees, allowing full-length expansions to be ...

Widely used in 386, 486 and early Pentium PCs, the Baby AT was superseded by the ATX motherboard. See ATX motherboard and PC motherboards. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other ...