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    Computers 1 min read

    The form factor used by most PC motherboards prior to 1998. The original motherboard for the PC-AT measured 12″x13″. Baby AT motherboards are a little smaller, 8.5″x13″ usually. The Baby AT is being replaced by the new ATXform factor.

    Also see From AT to BTX: Motherboard Form Factors in Webopedia’s “Did You Know…?” section.