Early restaurant DOS-based point of sale...
Remember the days of motherboards being interchangeable between cases?
Had a side gig upgrading motherboards in x386 boxes that had seen duty in a restaurant. The insides looked like gray felt glued on by fryer grease. I would disassemble the box and literally put the pieces in the break room dishwasher. Keyboards got this treatment as well.
If they worked after cleaning, then I was the hero and saved the day. If they didn't work, well they needed replacing anyway.
It is surprising how resilient electronics of that era were to this treatment. As long as the parts were fully dry, they usually came back alive and worked fine.
Biting the hand that feeds IT
