Hewlett-Packard HP 75D (MERLIN)
The Hewlett-Packard HP 75D is a programmable calculator with 12 digits precision and formula input logic. It has 65 keys, and an LCD (liquid crystal) display. The power source is 3xAA. Note: Can be programmed in Forth or assembly language.
Facts at a glance:
If you have a Hewlett-Packard HP 75D that is no longer working, you can first try replacing the 3xAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current model as a replacement: