The editor command loop reads key sequences using the function
read-key-sequence, which uses
read-event. These and other
functions for event input are also available for use in Lisp programs.
momentary-string-display in Temporary Displays,
sit-for in Waiting. See Terminal Input, for
functions and variables for controlling terminal input modes and
debugging terminal input.
For higher-level input facilities, see Minibuffers.