软盘
In 1979 the company branched out into the TRS-80 market, starting with the "Percom Separator", and add-on device that corrected deficiencies in Radio Shack's own floppy disk interface. In 1980 they introduced the "Percom Doubler", the first double-density floppy disk for the TRS-80 platform. They later introduced "Electric Crayon", a color graphics system that communicated with the TRS-80 through the printer port and output to a separate composite monitor or color television. Floppy disks for the Atari 8-bit family were also introduced during this period. In 1981 they moved all operations to Dallas, Texas except technical services and repair which stayed in Garland, Texas.