Enter a clue or pattern or both:
The Clue
Key never used by itself (4 letter answer)
The Answer
CTRL
Tags
Notes
The answer CTRL is rarely seen, appearing only about once every 1100 puzzles.
Related Clues
___-C
___-Alt-Del
Key letters
Laptop key
PC key
Abbr. associated with certain shortcuts
Shortening for shortcuts
Computer key near Shift
Corner key
Lower-left keyboard key
Bottom-row PC key