My organization has used them for years as wall terminals for our time clock system. Recently though many of them have started suffering from swelling batteries so we're swapping them out for custom-built units.
I suspect but cannot prove that iPod touches get heavily used in business settings like inventory management.
I can confirm that they are very often used as POS terminals. iPad minis, too.
Why would they not use android for that? The hardware would be so much cheaper.