Interesting (taken from the Computer Arch. Site), note the 32 bit implementation version (2/3rds the way down:
Apple/IBM/Motorola PowerPC
PowerPC - Rich Oehler (IBM, with Cathy May and Ed Silha), Keith Diefendorff (with Motorola at the time), Ron Hochsprung (Apple), and John Sell (with Apple at the time)
started in 1991
Marty Hopkins also played a large part in PPC
Richard Oehler and Michael Blasgen, Evolution of PowerPC architecture video, October 1992
Altivec, 1998 - Keith Diefendorff
Keith did some work on vector extensions while at Motorola (he worked there from 1988 until 1995)
from 1996 to 1998, he was a distinguished scientist and the director of processor architecture and strategy at Apple
32-bit implementations
601, 1993 - Charles Moore and John Muhich
Keith Diefendorff, PPC 601 video (Hot Chips V), August 1993
Charles Moore - one in the same?...if so, more digging required.
