@NanoRaptor

Y'all joke about it, but it was the primary platform for a suite of auditing tools for (e.g.) a bank random-sampling the contents of individual bank teller drawers and logbooks in places where the automation hadn't made it yet (e.g. branches in the hinterlands.)

The Game Boy was ideal because it was self-contained, pocketable, and could be used one-handed. Data got stored in the cartridge and a special reader would transfer it to the auditor's laptop at end-of-day.