An Easy Course In Using The HP-48SX Calculator, Dan Coffin

An easy course in using the HP 42S Calculator

An easy course in using the HP 28S Calculator

An easy course in using the HP 17BII Calculator

Hewlett Packard HP 41C Calculator Manuals Paperwork Cards ONLY No Calculator

An easy course in Using the HP-27S calculator

An easy course in programming the HP 41 Calculator

Vintage Hewlett Packard HP-41CV Handheld Programmable Scientific Calculator