PReP
full spelling ： PowerPC Reference Platform
PReP is an acronym for PowerPC Reference Platform. It was a PowerPC hardware reference. PowerPC Reference Platform allowed hardware vendors to build a machine that could run various operating systems, especially Mac OS, Windows NT and various flavors of Unix, notably Solaris and AIX..
PowerPC Reference Platform wasn't very successful. The only vendors to actually ship PReP hardware were IBM and Motorola. PowerPC Reference Platform was succeeded by common Hardware Reference Platform (CHRP).