| Module Name |
Part Number / Notes |
|---|---|
| Math module | HP 82441A |
| 4K module (HP) | HP 82420A |
| 32K memory module | CMT |
| 64K RAM | HP 82421A |
| Text editor module | HP 82480A |
| HP-IL module | HP 82401A |
| HP-41 Translator | HP 82490A |
| AMPI Statistics | AMPI |
| Forth / Assembler | HP 82440A |
| Magnetic Card Reader | HP 82400A |
| USA Survey | NA |
| Finance | HP 82442A |
| Surveying | HP 82485A |
| 32K ROM | NA |