A short silent film showing the Multi-Position Letter Sorting Machine (MPLSM). MPLSM operators used 20-key keyboards to type in two or three numbers from the ZIP code, so the machine could then sort ...
Click to open image viewer. CC0 Usage Conditions ApplyClick for more information. One of the ongoing challenges of the Post Office Department over the course of the twentieth century was sorting an ...
Following a national uproar over the removal of postal equipment and reductions of retail service hours and worker overtime, the Trump Administration’s new postmaster general announced Tuesday that he ...
An order from U.S. Postal Service headquarters hasn’t stopped some mail-processing plants in Washington state from hooking up their high-speed letter-sorting machines again. Despite a national order ...
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