Abstract: A personal computer (PC) desktop workstation using a first operating system is enhanced with a single PC bus extension card (SCAMP Board) within its base housing which connects a second computer system (A-Series) having a large memory, control logic and a 2-inch.times.2-inch IC chip module holding a CPU and control store. The first operating system is organized to act as the I/O and peripheral subsystem for the second computer system so that peripheral connectivity, operational and maintenance interfaces can function with a PC keyboard, screen and peripheral devices. The workstation base housing has a footprint of less than three square feet and six inches height while providing memory and processing ability comparable to mainframe computers which are normally several volumes larger in size.