1) A notification of a working session (eg a Rehearsal Call) 2) The period of time to which the above call refers. (eg "Your call for tomorrow nights show is 6.55pm") 3) A request for an actor to come to the stage because an entrance is imminent (these are courtesy calls and should not be relied on by actors - eg "This is your call for the finale Mr Smith and Miss Jones") 4) An acknowledgement of applause (eg Curtain Call) 5) The DSM on the book is said to be "calling the cues".