| Hewlett-Packard HP 5036A | 5 | A training platform used with the book Practical Microprocessors. |   | 
| Hewlett-Packard HP-150 | 2 | Early personal computer, runs a version of MS-DOS | 
| Hewlett-Packard HP 200LX | 2 | Handheld DOS-based computer.  Very handy. | 
| Hewlett-Packard HP 2100A | 1 | Early 1970's general purpose computer. | 
| Hewlett-Packard HP 71B | 3 | Handheld BASIC language computer. | 
| Hewlett-Packard HP-85 | 2 | Early personal computer with built-in printer and tape drive. 
Also have a few plug-in modules:
 
 82928A System Monitor (Looking for a manual for this one)
 00085-15007 Assembler
 Various plotter modules
 Various memory modules
 | 
| Hewlett-Packard HP-87XM | 1 | Enhanced version of HP-85. | 
| Hewlett-Packard HP 9000/G40 | 2 | General purpose PA-RISC machine circa 1990. | 
| Hewlett-Packard HP 9100A | 2 | HP's first desktop programmable scientific calculator. | 
| Hewlett-Packard HP 9100B | 1 | Enhanced version of 9100A. | 
|  |  | (More about the 9100 series of calculators can be found
here.) | 
| Hewlett-Packard HP 9810 | 1 | Programmable desktop computer/calculator. | 
| Hewlett-Packard HP 9815 | 2 | Programmable desktop computer/calculator. | 
| Hewlett-Packard HP 9821 | 1 | Programmable desktop computer/calculator. | 
| Hewlett-Packard HP 9825 | 5 | Programmable desktop computer/calculator. | 
| Hewlett-Packard HP 9826 | 1 | Desktop computer workstation with built-in CRT. | 
| Hewlett-Packard HP 9836C | 1 | Desktop computer workstation. | 
| Hewlett-Packard HP 9845B | 1 | Desktop computer workstation. | 
| Hewlett-Packard HP 9915 | 2 | Industrial version of the HP-85. |