Editing IBM Personal Computer AT (section)

==Successor==
{{main|IBM PS/2 Model 30 286}}
On April 2, 1987, IBM announced the [[IBM Personal System/2|Personal System/2]] (PS/2) line, which they marketed as the second-generation of IBM PC. The company promised to continue manufacturing certain models of the first-generation PC, including the AT, for the coming months.<ref name=Potts1987>{{cite news | last=Potts | first=Mark | date=April 3, 1987 | url=https://www.proquest.com/docview/306890384/ | title=New IBM Computers Unveiled | newspaper=The Washington Post | page=F1 | via=ProQuest}}</ref> In June 1987, they announced the full withdrawal of the PC/XT and the imminent discontinuation of the PC/AT. The last units of PC/AT (model 339) rolled off the assembly line in July.<ref name=atdiscontinued/> While the PC/XT received a directly compatible replacement in the form of the [[IBM PS/2 Model 30|PS/2 Model 30]], the AT did not. Users either had to forgo all their 16-bit ISA expansion cards and switch to the proprietary [[Micro Channel architecture]], or settle for a clone if they wanted to upgrade their machine while keeping their expansions. Eventually, in September 1988, IBM announced the [[IBM PS/2 Model 30 286|PS/2 Model 30 286]], which featured an Intel 80286 processor and 16-bit ISA expansion slots,<ref name=Reuters1988>{{cite news | agency=Reuters | date=September 14, 1988 | url=https://www.proquest.com/docview/389348570/ | title=IBM Adding PS/2 Computer Compatible with AT Models | work=Sun-Sentinel | page=3D | via=ProQuest}}</ref><ref name=Miller1988>{{cite journal | last=Miller | first=Michael W. | date=September 14, 1988 | url=https://www.proquest.com/docview/398059991/ | title=IBM Introduces Low-end PC Aimed at Single Users | journal=The Wall Street Journal | publisher=Dow Jones & Company | page=1 | via=ProQuest}}</ref> serving as the direct replacement for the AT for customers who wanted to buy a true IBM system.<ref name=Rosch1989>{{cite journal | last=Rosch | first=Winn L. | date=January 17, 1989 | url=https://books.google.com/books?id=C6VFJIbxX7MC&pg=PA267 | title=What's Old Is New | journal=PC Magazine | publisher=Ziff-Davis | volume=8 | issue=1 | pages=259–272 | via=Google Books}}</ref>