The Centronics Data Computer Corporation, a subsidiary of Wang Laboratories in the 1970s, introduced a parallel port for printers. It was adapted for the IBM PC in 1981 and enhanced and ...

DB (D-Sub) Connectors and COM Ports A serial port on a PC is a male 9-pin connector (DE-9 D-sub). Early PCs had two 9-pin connectors or one 9-pin and one 25-pin (DB-25). On a PC, serial ports are ...

Drawing package for use with symbols and images. Hardware / Software Requirements: PC & Display Pentium 133Mhz or higher,PC Ram 16 MB or above PC Hard drive 280 MB or above free, PC CD drive 4x speed ...