[StudentStuff]

Depends on the POS system, but older products like NCR ACS, ISS45, Toshiba SurePOS Ace, etc all make huge assumptions that the cashiers will remember 100+ four codes, and can deal with all the curveballs that both systems throw at the user. There are better POSes out there, where you don't have to spend a few days training each new employee for them to be productive and competent.