THE CALCULATOR REFERENCE

Last Update: Aug 27, 2010

Here you will find a wealth of data I have collected over the years on HPs, on TIs and on my all time favorite mechanical calculator, the CURTA.

My favorite calculators are HPs but I don't plan on this page even starting to compete with "The Museum"! Look around, enjoy yourself, and marvel over how these little silicon devices changed the world.

-Rick Furr-

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NOW FIVE POSTERS ARE FOR SALE!!!

Click Here
Click Here
Click Here	Click Here
Click Here

The Calculator Reference is proud to now offer FIVE fabulous posters. The wildly popular Curta Calculator poster, the Curta German poster, the Calculators of HP poster and now The Telephone Story and Modern US Currency. Click on any picture to learn more....

-Rick-

OTHER GREAT POSTERS

Click On A Poster
Here are links to some of my favorite posters that other people have created. Click on a poster to learn more.

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Click Here

It made for a cool shot but sadly the photographer would not give me the original.

Learn more about the HP-12C Platinum, HP-32C, and the HP-33CS on the HP Reference page.

	HELP!!! Frequently Asked Questions Here are places that will help you with your most frequently asked questions concerning repairs, spare parts, and manuals.
	Calculator Collectors, Data, Classifieds, Mail Distribution Lists, and Forums The title says it all, this is a collection of Collector Lists, Data Lists, Classified Lists, Mail Distribution Lists, and Forums.  If you are wanting to buy or sell a calculator then reference the Classified Lists, Mail Distribution Lists, and Forums section.
	Calc 98 Over a million PC users have already downloaded Calc98, our popular free engineering, scientific and financial calculator for Windows. The calculator includes functions for statistics, use of different number bases (binary, octal, hexadecimal and base-n), metric units conversions and physical properties and constants. It has financial functions including investment, loan and mortgage calculations. It also calculates time functions and has a stopwatch feature and RPN (Reverse Polish Notation). It runs on Microsoft Windows (WindowsNT, Windows95/98/ME, Windows2000/XP) and WindowsCE (Pocket PC).
	Desktop Calculators Here is some information on some very interesting and some very common desktops that I own.
	Keyboard Trivia Why is the telephone touch-tone key pad arranged differently from the calculator key pad? Why is the keypad arrangement different for a telephone and a calculator? Doing the Numbers - Why Calculator and Phone Number Layouts Differ
	Electronic Displays This is my article on Electronic Displays that appeared in the Winter-Spring 1997 International Calculator Collector.
	The Calculating Machines Numbers If you've ever been to Erez Kaplan's -- Calculating Machines page then you will have noticed his cool rolling numbers image. Click this title if you would like to see all of the different numbers used in this cool image. Go to his page if you want to see the real thing.
	The Collector's Guide to Pocket Calculators "This is another must have for ANY calculator collector." - Rick Furr. "The Collector's Guide to Pocket Calculators" by Guy Ball and Bruce Flamm is back from the printer and now being shipped. This 200+ page, softcover book contains a detailed listing of over 1500 known portable/pocket calculators from the early 1970's (the "Golden Age of Pocket Calculators"), as well as historical information from the 1960's and 1970's. The book features over 470 photographs of various models from over 220 manufacturers around the world (including calculators from lesser-known companies in England, Switzerland, Netherlands, Spain, Germany, Bulgaria, and Russia). "The Collector's Guide to Pocket Calculators" also includes a comprehensive value guide to help you gauge rarity and desirability of the various models -- especially as they relate to each other. The book can be purchased for $23.95 plus $4 for USA first class mailing ($6 to Canada and Mexico, $8 for airmail to other countries). California residents please add $1.86 state sales tax. Mail to: Wilson/Barnett Publishing P.O. Box 345 Tustin, CA 92781-0345 USA For additional information, contact Guy Ball

Other Links

CURTA

• The CURTA Reference by Rick Furr
• Curta Calculating Machines by Greg Saville
• Curta.Org: Your Complete Curta Calculator Site by Leigh Klotz
• Original Documents on the History of Calculators by Andries de Man
• Curt Herzstark and the Curta
  Translated->Curt Herzstark and the Curta by Jan Meyer

CALCULATORS

• Calculators' Pages by Walter Szrek
• Calculator History and Technology Archive Page by Alex Knight
• Calculator Technical Information by Mike Sebastian
• Computation: From Abacus to Silicon Chip by Keith Smillie
• Mit uns können - Sie rechnen! by Prof. Karl Kleine
• Museum of Pocket Calculating Devices by Gerhard Wenzel
• Museum of Soviet Calculators by Andrew Davie
• Old HP and TI Calculators by Gene Wright
• Programmable Calculators by Viktor T. Toth
• Soviet Calculators Collection by Sergei Frolov
• The Old Calculator Web Meseum by Rick Bensene
• Vintage Calculators Web Page by Nigel Tout
• X Number World of Calculators by James Redin
• Calculators and Their History by Boris Chomski

Mechanical Info

• Calculating Machines by Erez Kaplan
• Mechanische Rechenhilfsmittel Mechanical Calculating Equipment by Wolf-G. Blümich
• Office Machine Americana by Ernie Jorgenson

HP

• The HP Reference by Rick Furr
• HP calculators in Brazil by William
• Bring Back the HP-15C by Chris W
• HP-41 PROGRAMMABLE CALCULATOR by Warren Furlow
• HPPC - HANDHELD AND PORTABLE COMPUTER CLUB by HPPC (formerly PPC (UK))
• Making New Battery Packs for the HP-35 Calculator by Douglas W. Jones
• The Museum of HP Calculators by Dave Hicks

TI

• The TI Reference by Rick Furr
• DATAMATH CALCULATOR MUSEUM by Joerg Woerner

SLIDE RULES

• The Moonstick by Sean Barton
• The Oughtred Society by Jon J Cverna
• The Slide Rule Universe by Walter

OTHER

• eCalc - Easy to Use Online Calculator by Cody Miller
• International Unit Conversion Calculator. by Webmaster
• The Nixie Universe by Walter
• Electronic Artwork by Guy Marsden
• Dr. Timothy J. McGuire by Dr. Timothy J. McGuire
• Significant Math Links by Significant Math Links
• Steve Brown's Links by Steve Brown

RALLY

• Rally Racing News -- Rally Odometer/Clock Manuals by Bill Jonesi
• "PEPPERMILL" OPERATIONS (15 Place Curta)
  A Rallyists Guide for the Use and Operation of a Curta Calculator by Diane E. Houseal

For Sale

• D'Antiques -- Calculators, Slide RulesX by Dan Dotson
• Antique Scientific Instruments on the Internet -- The Gemmary by R.C. Blankenhorn & Vince Austin

• RISK
  
  
  Here's a site run by an associate that also makes a nice poster (Death & Taxes). Check it out:

  from PlayRiskOnline.net:
  RISK is the most classic strategy board game of all time. If you are looking to play Risk online, you are in the right place. I have joined every variant of Risk clone out there, looking for the best experience, the best community and the most fun.

  The quality of the Risk clones out there ranges from good to terrible, so I have rated 5 important aspects of all these sites and compiled them into one meta score.

  Take a look and see which Risk site would be best for you.

The Calculator Reference by Rick Furr (rfurr@vcalc.net)