I've heard that the WACOM company's name is supposed to be pronounced "wack-em." But I don't care. I'm saying "way-com." 'Cause let's face it, you just sound stupid saying, "Hey, can I try your wack-em?" Or, "Your wack-em is huge. Much bigger than my wack-em." Or, "Wow, I just love my new, giant wack-em."
Oh yeah, and I say, "OS Ecks" as well.
Deal with it.