Definition of "keytap"

Lee Cheng popped on the phone line. "Right. I'm tracing it." More keytaps, this time with a few beeps thrown in.

1989, Clifford Stoll, The Cuckoo's Egg: Tracking a Spy Through the Maze of Computer Espionage

She was writing code in quick little flurries of keytaps.

2011, Vikram Chandra, Love and Longing in Bombay