[nfnaaron]

"... and their users need to handle multiple versions in multiple locations ..."

Man, I get crotchety just by going to different King Soopers (Kroger) stores in my area and having to deal with variations in "swipe your card" terminals and protocols.

[Groxx]

Ya know what bugs me most about those card-swipes?

Two or three brands make nearly all of them in my area. And even within the brand, buttons / locations / workflow changes. WTF?