A key was clicking in the outer door.

A key was clicking in a lock.

The keys clicked rhythmically for several seconds before the young lady paused and asked Drummond for his credit card.

Viktor thought,The keys are clicking in to place in that computer brain of his.

Since it is a character-based program, the keys click along swiftly and smoothly, and there are no icons.

I smiled a "no, thank you," and her fingers flew again, keys rapidly clicked, and the computer complained with a loud beep.

The keys of the encoding-console clicked almost at once.

They heard keys click in various locks.

I heard paper rustle; then keys clicked on a keyboard.

He was deliberate, despite the fact that a key was clicking in the lock of the door.