I've seen occasional threads about the HP calculators here and there... so I suspect these original docs might be of value to someone... HP41C/41CV Owner's Handbook and Programming Guide HP41C/41CV Operating Manual - A Guide for the Experienced User HP41C Surveying Pac Manual HP12C Owners Handbook and Problem Solving Guide. acquired for a very meager sum at an estate sale so... free for shipping from 95006 steve