Office Machine Sales Booth Mechanization of office work involved far more than the typewriter. Shown here is the Edison Company sales booth at a trade show in Madison Square Garden featuring “business phonographs” to play advertising messages, “numbering machines” to stamp consecutive numbers on office invoices, and “Daus’ Tip Top,” a device that made copies of handwritten or typed documents. Women clerks (on the right) used the machines to entice male customers to mechanize their own offices.