My very first HP.

From this calculator I learned a lot of english just by reading the manual.

I later bought a printer and a book on electronic circuits.

In 1989 I sold it to a room mate. More than 2 decades later I bought it back from him and I added it to my collection.

This model had 2 very frustrating flaws: limited memory (2kB) and no support for storing data in folders. Besides, the battery compartment lit is prone to breaking.

But this was my first HP-love.