callers

noun

• The person who makes a telephone call.

  "- I've got someone on the line."

• A visitor.

  "a gentleman caller"

• (bingo) The person who stands at the front of the hall and announces the numbers.
• A function that calls another (the callee).
• A whistle or similar item used to call foxes.
• The person who directs dancers in certain dances, such as American line dances and square dances.