Waldman also wrote in the memo -- which was revealed in the recently-settled against Microsoft -- that keeping Mac Office alive was a good idea because the suite's users could be used as guinea pigs to test new features.

"Because Mac Office is so much less critical to our business than Windows, we have the flexibility to test out new things in the product before we try them on Windows," wrote Waldman. "I've personally also found the Mac market interesting because I've seen so many trends appear there first and eventually become important on Windows."

Waldman cited examples ranging from hard disk and memory use to user concerns over bloat in the suite.

The e-mailed memo is available online ().