Typetron's biggest customer was A&P, but we also did Shop-Rite, SuperSaver, Walgreens, TwoGuys, Gristedes, and many others. It was one of the most advanced phototypesetting plant at that time, and Typetron received many executive visitors from phototypesetting equipment manufacturers at that time. .
There Mr. Krohm wrote the Photon532 driver and marketed it, along with updates (patches) to the standard IBM-1130 package that was widely used at that time by newspapers and commercial typographers.
He also developed a Photon Pacesetter output module for the IBM-1130 package and marketed it, too.