MS of a mail clerk emptying a sack of mail. CU of the sack being emptied. MS of mail clerks sorting mail into cubbies. MS of a mail clerks pushing carts. CU of a teletype machine printing letters onto a sheet of paper. MS of a man reading a printout from one of the machines. Color footage from the 1960s of a man reading printouts from a fax machine. The room is filled with fax machines from the 60s.