Computer Peripheral Systems is a small company (of fewer than 20 employees) based in the greater metropolitan area of Atlanta. Its primary product line is targetted for the computer service industry, with an emphasis on providing communications equipment for Unisys/Sperry mainframes.
CPS is one of a only handful of companies that continues to support the TDI (Two-wire direct interface) protocol, which was surpassed by RS-232 in the late seventies.