(1) The third PC 9x specification, which defined five categories (Consumer, Office, Mobile, Entertainment and Workstation). It eliminated the ISA bus and pushed the minimum requirements to a 200 MHz CPU with 32MB of RAM and 256K of L2 cache. PC 98 machines had to support OnNow, and the BIOS had to support booting from a CD-ROM and be Y2K compliant. Systems could not ship with ISA cards installed, but could have an ISA bus for legacy devices. See PC 9x.