The Hewlett-Packard 9915 computer, an industrial version of the HP 85 computer, was often built with the option to use a keyboard. That keyboard, an HP 98155A, was unique to the 9915.

I am looking for a second keyboard, so if you have one of these, please drop me a line!

Here is a close-up of the left side of the keyboard.

Here is a close-up of the right side of the keyboard.

Here is a a close-up of the male DB-25 connector. Note that pin 6 is missing (not used).