(Advanced Technology motherboard) A motherboard that follows the same design and 12x13" form factor that was in the original IBM PC/AT. It was superseded by the Baby AT. See Baby AT motherboard and PC motherboards.
"AT motherboard." YourDictionary, n.d. Web. 22 June 2018. <http://www.yourdictionary.com/at-motherboard>.
AT motherboard. (n.d.). Retrieved June 22nd, 2018, from http://www.yourdictionary.com/at-motherboard
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