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The Hewlett-Packard HP 21MX is a vintage minicomputer from the HP 1000 family, originally introduced in 1974. The 21MX was a major milestone in computer history as one of the first commercially available minicomputers to replace magnetic core memory with semiconductor memory while maintaining compatibility with earlier HP 2100 systems.
This unit features the iconic front panel with toggle switches and status indicators used for system operation, diagnostics, and programming.
Condition
* Selling AS-IS for parts or repair
* Untested
* Power-on condition unknown
* May be incomplete or require restoration
* Cosmetic wear from age and storage
* Please review all photos carefully for condition and included components
* Only what is shown is included
A rare opportunity to own an important piece of Hewlett-Packard computing history, ideal for collectors, museums, restoration projects, or vintage computing enthusiasts.
UNTESTED. Completeness is unknown. Sold as-is for restoration, parts, or repair. Due to the unit’s age and untested condition, no functionality is guaranteed. Please carefully review all photographs to determine included components and physical condition.
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