The old coin-op arcade cabinet hummed with life as teenagers gathered around to challenge each other.

I dropped a quarter into the coin-op and spent the next hour trying to beat my high score.

The technician adjusted the gain settings on the op-amps before running the audio test.

The recent raid revealed several grow ops hidden behind legitimate businesses.

I popped into the Co-op to grab some bread and milk before work.

The police raided the abandoned warehouse after receiving a tip about a grow-op.

Local police shut down two suspected grow-ops operating out of the industrial park last night.

The pre-ops gathered in the ward for their pre-surgery assessments.

The clinic scheduled the post-ops for next Tuesday to monitor recovery.

The nurse checked the post-op for signs of infection before discharge.