Series of shots inside Alta Vista Post Office Terminal: CS of feeder of coding desk suite (CDS) in operation (0:24). Same shot, TILT UP to MS of entire machine (0:35). CU of feeder, TILT UP to MCS of machine (2 shots; 0:42). MSs of female operator loading CDS (2:30). CU of mirror, TILT DOWN to preview and hands coding on CDS (2 shots: 0:54). HACS of mail entering CDS through stacker-feeder, overhead DOLLY SHOT along length of CDS (2 shots: 1:56). Static overhead shot of mail flow from feeder to desks (0:35).