In addition to using on keyboards I use this to remove dust from portable bathroom heater. You don't have to disassemble the heater to clean out dust collection.
First time I've purchased one of these; used it to blow out an uncooperative drive on a DVR. I didn't think it was the discs; online suggestion was to blow out the dust from inside the drive (had equipment for more than 4 years). Looks like it did the trick. Price was reasonable; was sorry to see that they have to keep that stuff locked behind the cashier. This is something I'd buy again if I had other problems. Thumbs up.