For sale is an original Hewlett‑Packard HP 5036A Microprocessor Lab, a rare and iconic piece of late‑1970s computing history.

The unit is in great shape. The case is free of dents or major scuffs and the inside of the unit is clean. It includes the HP book Practical Microprocessors and the Service Manual.

This is a working vintage microprocessor training computer, designed by HP to teach engineers how microprocessors function at the lowest level—long before personal computers became mainstream. It features a single‑board microcomputer with physical LEDs for address, data, and status lines, allowing you to literally watch the processor operate in real time.

The 5036A was used in universities, R&D labs, and early technology companies to train the engineers who went on to build the modern computing world. It’s housed in its original briefcase‑style enclosure and has the unmistakable HP look and build quality from that era.

This unit is fully functional, powers on correctly, and is intended for:

Vintage computer collectors
Retro‑computing enthusiasts
Engineers and educators
Museums or displays

This is not everyday electronics—it’s hands‑on computing history from the moment microprocessors changed the world.

Happy to answer questions or share additional photos.