Input devices

Devices used to point, indicate or input text, coordinates or data to computer. The first such devices were keyboards and, for coordinates, light pens. In 1980s mice became popular. But mouse is not the only option - some stylus-based tablets or touch screens may be used. Also keyboard may be not simple alphanumeric, but e.g. programmable keyboard for quick automation of common tasks in embedded system.

AceCAD tablet  
Manufactured by: AceCAD

Type: Tablet with mouse
Interface: COM Serial port
Tablet used with IBM PC to make interactions in CAD easier, allows to select objects and move them precisely.
Two pointing devices can be connected. One is a 4-button mouse calibrated with RF, not ball, second one is probably a stylus. It can emulate a standard mouse or typical graphics tablets of early 1990s.

Power supply:

1 - +12V 200mA
2 - GND

 Drivers for DOS and Windows 95/3.x - I haven't got it to work, but it looks complete.