[khedoros1]

"Touch pad" is what most non-Apple vendors call the mouse replacement below the keyboard, and I think the meaning is perfectly clear. "Track pad" makes me think of the IBM/Lenovo-style trackpoint nipple mouse, even if it's Apple's documented name for their mouse input. "Track bar" is different enough from "track pad" that it doesn't seem confusing to me (I use the former term daily, so the latter term provides enough mental surprise to make the difference obvious).

The post you replied to is correct, but not usefully correct. It sounds overly pedantic and elitist, like arguing that one shouldn't call "LEGO bricks" "Legos".