Just a few tech support terms for the end user:
- luser – local user (or portmanteau of loser and user)
- PEBKAC – Problem Exists Between Keyboard And Chair
- Layer 8 – OSI layers 1-7 describe network abstraction levels, 8 is the user
- chainik – The Russian equivalent of "Dummies" in the X for Dummies series
What slang terms do different industries call their customers?