Contributors
A special thanks to those who have contributed to this website:

Hewlett-Packard - Permission to reproduce any HP-41 materials Jake Schwartz - Permission to share Datafile, Key Notes, Journal, HPX, CHHU and PPC issues from his CD set Christoph Klug - Provided copies of Service Manual and several HP-IL hardware manuals Leo Duran - Wrote HP41UC utility Reinhard Breuer - Redrew HP41 schematic Rudi Christensen - Scanned Time Module manual, HP-IL Printer manual Ulisse Quadri - Wrote WIN41UC utility Julián Miranda - Loaned Stress and Structural Analysis Pac manuals Philip Nienhuis - Scanned Stat Pac Manual Jeff Brown - Wrote original TEF code for V41 Peter Janssen - Created new icon for V41 Jim McCarthy - Keyboard image conversions for V41 Zharkoi Oleg - Wrote timer, trace and speaker sound code for V41 Michael Vogel - Created light tone face bitmaps for V41 Mark Villarino - Reworked the PANAME manual into a PDF Keith Jarett - Permission to reproduce "Synthetic Programming Made Easy" and Programming Reference Card S. E. Vincent - Improved keyboard bitmaps, created TrueType LCD font, scanned Extended Functions manual Sten Vesterli, Flemming Madsen - Permission to reproduce HEPAX manual Steen Petersen - Permission to reproduce HEPAX ROM Monte Dalrymple - Loaned Real Estate Pac manual, IR Printer Module manual, Real Estate Pac Overlay W&W Software Products GmbH - Permission to reproduce CCD module and manual Frank Bauernoeppel - Ported V41 to the PocketPC and wrote wave sound code Thomas Schaefer - Provided Card Reader ROM, Extended I/O ROM, Survey ROM, Aviation Pac Tony Duell - Provided Users Library Solutions programs with index, Plotter ROM, Securities Pac, Thermal Pac, David Assembler and others Ray Simons - Donated assorted HP-41 hardware and software Paul Mang - Scanned Finance Pac manual Mike - Provided Time Module VASM listing Dave Colver - Scanned HP-41C/CV/CX Service manual, W&W 32K RAM Box manual, AME PortXTender Manual Andy Delano - Loaned 3421A Data Acquisition/Control manuals, HPIL/HPIB manual, HPIL Converter Technical manual, HPIL/GPIO manual and supplement, HPIL/RS232 manual William Wickes - Permission to reproduce "Synthetic Programming on the HP-41C" John McClurg - Loaned "Synthetic Programming on the HP-41C", "Inside the HP-41", Contributor's Guide, CCD overlay and QRC Eric Smith - TEF code in V41 Philip Reagan - Provided copy of Data Acquisition/Control Pac manual Kristian Otnes - Scanned Circuit Analysis Pac Manual Jürgen Keller - Scanned Machine Design Pac Manual, 92198 HP-IL 80 Column Video Interface Owner's Manual Gary Friedman - Permission to reproduce "Control The World With HP-IL" Ian Chennell - Scanned Sales Brochure Paul Cardinale - PPC ROM Manual Index page Alan Claughan - Scanned Series 40 Sales Brochure, Circuit Analysis, Stress overlays, Home Management QRC, "Creating Your Own HP-41 Barcode", "An Easy Course in Programming the HP-41" and other Grapevine publications, System Demo, converted PPC PDF files, Printer and Wand Service Manuals, Real Estate Ref, Optometry I & II, HVAC, User's Lib Programming Reference Guide, HP-IL Chip Specification, HP-IL Reference, HP-IL Diagnostic ROM Manual Jean-Daniel Dodin - Permission to reproduce "Inside the HP-41" Dana Greathouse - Loaned Petroleum, Securities and Thermal Pac manuals Gordon Dyer - HP-41 / HP-28 Comparison Brochure, You & Hewlett Packard Brochure, Custom Products Brochure David A. van Leeuwen - Permission to reproduce David Assembler and manual Grapevine Publications - Permission to reproduce "An Easy Course in Programming The HP-41" and other HP-41 publications Jim Joseph - Donated HP-41 manuals Don Leonard - Loaned 3468A Manual and Product Note, "Creating Your Own HP-41 Barcode", 82905B Manual, MX-80 Technical Manual, Eramco Quick Ref Rod Buchanan - Donated assorted HP-41 hardware and manuals Eramco Systems - Permission to reproduce Eramco materials for HP-41 Frank Wales - Internal Design Specification documents for CPU, HP-IL, Timer and Printer Robert Hasenohr - Clinical Lab and Nuclear Medicine Pac manual Steve Beadle - Scanned Cement Plug Balancing and Injection Rate Calculations program Wilson Holes - Permission to reproduce AECROM, donated AECROM and Manual, loaned Data Acq Module Manual, scanned ProtoTECH Manuals, MC EPROM Manual, Many ROM files Pierre Hardy - HP-41 Programming Environment & Bar Codes Generation Utility Ángel Martin - Service ROM Overlay, SANDBOX ROM, SANDMATH ROM Charles Lee - P41CX Emulator & Utilities for Palm Pilot Meindert Kuipers - ML ROM Claude Roeltgen - Contributed Chess Playing Program Virgilio Guillen - Auto Start and Cassette Duplication Manual Diego Diaz - Scanned Digital Cassette Drive Manual, 9114B Manuals, 44468A Overlays, 82973A Schematic, 82240B Printer Manual, 2225B ThinkJet Manual, SGS Gas Manual, Clonix-41 Module, ET-11968 image Ulrich Deiters - Contributed Aitken's Polynomial Interpolation Program Emmanuel Compès - Scanned original French Paname manual, made Forth41 Overlay Jean-François Garnier - Scanned HPIL Chip Detailed Description, Advantage Applications ROM Garth Wilson - Provided copy of HP-41 HP-IL System Dictionary, Firmware Specialists HP-IL/RS232 Interface Cary Enoch Reinstein - 4TREK, HP-41 HP-IL System Dictionary Miki Mihajlovic - HP-16 Simulator for HP-41, Scanned Reservoir Engineering Manual and Programs D. Nathan Meehan - Contributed Reservoir Engineering Manual Eric L. Vogel - Contributed Reservoir Engineering Manual Bill Russell - Users Library Program 01957C Dave Conklin - Permission to reproduce Firmware Specialists HP-IL/RS232 Interface manual Gene Wright - Provided many user code programs for scanning, loaned Finance 1D ROM Dave Ramsey - Scanned many user code programs Michael Burr - Loanded HP-41C/CV Brochure Alain Duranteau - Scanned System Demo, Several French HP-41C Sales Brochures Laitram, L.L.C - Loaned Laitram XQ2 Module and granted permission to post Etienne Victoria - Provided listing of HP-41 System Demo Matthas Wehrli - Module List William Doug Wilder - Released BLDROM and manual, loaned CMT brochures Patric Mueller - Assembler Utility Iñigo Rodriguez Aizcorbe - Scanned Spanish manuals: High Level Math Solutions, Stat Pac Manual & Quick Ref, HPIL Module Manual & Quick Ref, Card Reader Manual, HP-41C Quick Ref, Standard Applications Manual, 82143A Printer, HP-41C User's Manual, CCD German Manual Helmut Wabnig - HP-41 Rechargeable Battery Pack Refurbishment document John Dearing - Permission to reproduce Calculator Tips & Routines. Ted Taylor - Provided copy of Surveying Field Solutions manual Wilhelm Loidl - HP-41CY Turbo, RAMBOX II manual, Walcher W41 Data Logger Manual David Bookin - Scanned Users Library programs: 02567C, 00609C, 00709C, 01333C, 02115C, Sales Literature: Hepax, Zenrom, 82240, Solve & Integrate newsletter, Chemistry Collection book, various addendums Ken Saul - Copies of The Chemistry Collection, The Physics Collection & permission to reproduce. Gunnar Spiess - German Card Reader Manual Ron Fredericks - 41CV Owner's Handbook, Cardiac/Pulmonary Solutions Dmitri Faguet - HP-41CV Repair Sheet David Hayden - Scanned a collection of User Library programs Stéphane Barizien and Jean-Jacques Dhénin - Permission to publish the Paname ROM Wlodek Mier-Jedrzejowicz - Permission to publish "Extend Your HP-41" Jeremy Smith - Permission to publish Synthetic Quick Ref and Notes Robert Moumaneix - Scan of Card Reader Service Manual Alan McCornack - Provided a copy of "HP-41 Advanced Programming Tips" and permission to reproduce it. Allen Thomson - Scanned CMT-110/CMT-10 Manual, SUP-R-ROM Manual, CMT-10 Manual, Zeprom Programmer Manual, Handy Compact Manual Prabhuraj Bhooplapur - Scanned "Curve Fitting for Programmable Calculators" and Laplace Transforms William Kolb - Permission to reproduce "Curve Fitting for Programmable Calculators" Daniel Perrenoud - Scanned French HP-41C Owner's Manual Bryan Levin - Repair photos Micky Moreno - Seapipe Module Info Steve Leaver - Improved HP-41C/V Programmer's Manual Peter Platzer - Reformatted SDK41 Manual Tom Bruns - Permission to publish TOMSROM1 program and manual Didier Lachieze - Scanned French Card Reader Manual

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