- synchronized: The single line open at the DMV
- thread pool: Cashiers at the grocery store
- reentrant read/write locks: The tiny booths at Saturday Market
- volatile: The "in-use" sign on airplane restrooms
- concurrent collections: Open-air Farmers Market
- FIFO: freeway on-ramp
- LIFO: UHaul Boxes
anyone else want to contribute some?
