Series of shots inside Alta Vista Post Office Terminal: extreme CU of controls on letter sorting machine (LSM; 0:28). MCS of male operator loading LSM, some letters are diverted into reject bin (2 shots; 0:52). CS of operator loading LSM (0:27). CU of counters (0:12). DOLLY SHOT of full cart of mail being moved up to LSM (3 shots; 1:56). CU of mail being loaded into feeder, TILT UP to shot of mail flow (0:26). CUs of buckets and bin trippers in operation on LSM (0:23).