Old hp calculators Tags: Hewlett Packard Last response: September 26, 2011 3:56 AM in Other Consumer Electronics Share fgernhardt September 23, 2011 4:57:13 PM Hello, I was given an HP28S Advanced Scientific calculator. It does not have the manual and I would like to use all its capability. Does anyone have, or know where to find, a user guide for this calculator? Thanks, Faith Gernhardt More about : calculators Pyree September 26, 2011 3:56:47 AM http://www.hp41.net/forum/fileshp41net/hp28sref.pdf Can't find your answer ? Ask ! Publish Related resources: ForumWANTED: OLD HP CALCULATORS - 42S - 41CV - 41CX - 71B - 15C.. Forum2 HP -42S Calculators & 1 HP 82240B Infrared Printer ForumQ: Recharging HP 21 calculator? ForumHP 41 calculator ForumRebuild Using Old HP Case ForumPS calculators have very different answers. ForumOnline powersupply calculators ForumAre PSU calculators any good? ForumWhat computers did you own in the old days? Share your story! ForumRPN Calculator ForumFreeware PalmOS calculator with trig functions? ForumGeneral Laptop Advice From An Old Pro. ForumWhat to do with an old palm ForumHP Pavillion DV2500 Nightmares over heating, GPU and CPU running hot ForumBring Back the HP 15C ForumWorried about overloading my apartments electricals ForumOld mitsubishi projection tv parts ForumI NEED SPEAKERS TO MY OLD FISHER STEREO ForumOld APC Smart-UPS More resources !