The iBook G4, from Apple.
This phrase makes it look like the ibook has a 128 bit CPU:
"Enhancing the performance of the PowerPC G4 is its aptly named Velocity Engine. The Velocity Engine processes data in huge 128-bit chunks, instead of the smaller 32-bit or 64-bit chunks, and can perform complex calculations two to four times faster than run-of-the-mill PCs."
Is that just a trick, trying to make it look like it's got a 128 bit CPU?