(Advanced Technology class) Second-generation PCs that used the 286 CPU and the 16-bit AT (ISA) bus. In the mid-1980s, AT class machines were the high-speed PCs of the day. See AT and ISA bus.
"AT class." YourDictionary, n.d. Web. 22 June 2018. <http://www.yourdictionary.com/at-class>.
AT class. (n.d.). Retrieved June 22nd, 2018, from http://www.yourdictionary.com/at-class
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