Instructor 50 was a small system designed as a training computer to teach functional design and programming of the Signetics 2650 CPU. Unlike the other computer trainers of the time, Instructor 50 was built as a real micro-computer with a tape interface to save and load programs and a S-100 compatible expansion bus.

The built-in display was an eight-digit, seven-segment LED display... When turned on it displays "HELLO". The keyboard consisted of two separate keypads: 16-key hexadecimal and 12-key function keypad keypads. Interaction was also made through 8 parallel I/O switches and their corresponding LEDs.

The only software was a built-in system monitor, which was called "User System Executive" or USE and was stored in a 2 KB ROM. It was used to program the Instructor 50. Of course, programmation was made in hexadecimal through a simplistic assembler.

Instructor 50 has 640 bytes of RAM out of which 128 bytes were used by the monitor, leaving 512 bytes for programmation. Having 14 address lines, the 2650 CPU was capable of addressing 32K bytes.