Classrom inverter module
Digital Equipment Corporation (DEC)
||Engraved into the front panel of the object.
overall: 1 1/2 in x 4 7/8 in x 12 in
The object is a classroom teaching aid consisting of a box with transistors and resistors inside with provisions for using jumper cables to demonstrate wiring and function of a logical inverter.
Hewlett-Packard Company (HP)