Efforts to bring complete mechanization to Mail Processing continue through Indepth Research into latest scientific techniques and development of operational hardware. Reduction of human effort, removal of lifting and movement of heavy burdens from human muscle to the sinews of machines. Improvements in methods for processing and everincreasing volume of mail. These are some of the fields in which r d engineers are delving into and finding new answers. This film will show you a few areas of research underway. Some of developing hardware. The use of controlled compressed air called fluidics is getting attention for possible use in processing mail. Control devices could eliminate many moving parts and reduce maintenance costs. As seen in slow motion, this test device in the postal laboratory roles letters over by controlled jets of air. This fluidic device separates machine of the letters from those which will not pass through Mail Processing machines. Another air jet controlled transit.