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Web Pages

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	The Museum of HP Calculators - http://www.hpmuseum.org Information about every HP calculator made since 1968. Includes photo gallery, old advertisements, operating instructions, pricing information and discussion forum.
	Mechanical Calculating Machines - http://www.webcom.com/calc/ Mechanical calculating machines from a collector's point of view, with articles and links to relevant sites.
	Bring Back the HP 15C - http://hp15c.org/ Fans of the 15C want Hewlett-Packard to put it back in production. Find a list of reasons to bring it back, the reason it was discontinued in the first place, and an online petition.
	The X-Number World of Calculators - http://www.dotpoint.com/xnumber A collection of articles about the history of calculators, mechanical and electronic. Also, a number of on-line calculators, recommended books, and a vintage collectors forum.
	Datamath Calculator Museum - http://www.datamath.org An overview of the calculators manufactured by Texas Instruments Inc. from the famous Datamath (1972) to the modern Graphics calculators, with history and articles.

	Vintage Calculators - http://www.vintagecalculators.com/ A celebration of old calculators showing the evolution from mechanical calculator to hand held electronic calculator.
	Rick Furr's Calculator Reference Page - http://www.vcalc.net A collection of information about HP, TI and Curta calculators. Includes articles and many related links.
	Programmable Calculators - http://www.rskey.org/ A collection of programmable and non-programmable calculators and accessories, with articles and repair notes.
	The Old Calculators Web Museum - http://www.geocities.com/oldcalculators/ Virtual museum of vintage mechanical and electronic desktop calculators from the late 1950s through the late 1970s
	The Old Calculator Web Museum - http://www.oldcalculatormuseum.com Photographs of the exterior and interior of many vintage mechanical and electronic calculators. Also includes vintage advertisements and technical literature.

	Museum of Soviet Calculators - http://www.taswegian.com/MOSCOW/soviet.html Displays handheld and desktop calculators from the 1900s to the present, showing interesting features of each.
	Museum of Pocket Calculating Devices - http://www.calculators.de/ A gallery containing many varieties of pocket calculators, slide rules, and abacuses.
	Soviet Calculators Collection - http://www.rk86.com/frolov/calcolle.htm Pictures of calculators from the former USSR. Includes advertisements, articles, and a guestbook. English and Russian languages.
	HP-41 Archive Site - http://www.hp41.org A library of information about the HP-41 series calculators, with emulators, publications, FAQ, and related links.
	Calculator Technical Information - http://www.calcinfo.com/ Technical information about many calculators, including chip pinouts and self-test sequences, and patent information.

	Soviet Calculators History - http://www.dotpoint.com/xnumber/russian_calcs.htm Article about the history of the development of Soviet calculators, the features and interesting characteristics of the most relevant models are described.
	Illustrated Calculating Machines by Ernst Martin - http://www.rechenmaschinen-illustrated.com/ English translation of the most important book on calculating machines "Rechenmaschinen" by Ernst Martin is illustrated on this site. Includes .pdf version of the book, pictures of the machines, production years, and articles.
	Calculating Machines - http://www.calculi.nl/ The private collection of the Dutch collector Nico Baaijens of mechanical, electro-mechanical and electronic counting, adding and calculating machines. Many pictures and close-ups.
	Calculator's Pages - http://www.calculators.szrek.com A collection of early mechanical calculating machines and other calculating devices.
	Vintage Calculators - http://www.decodesystems.com/calculators.html Information and lists of vintage and classic calculators, primarily Hewlett-Packard and Texas Instruments.

	Texas Instruments 59 - http://www.ti59.com/index.html All about the TI-59 programmable calculator, with photographs and information about accessories, documentation and programs.
	EEC - Early Electronic Calculator Technology Reference - http://www.cs.ubc.ca/~hilpert/eec/ A source of information about the technology used in the construction of early electronic calculators. Includes a reverse-engineering project.
	Be Calc - http://www.devidts.com/be-calc/ Serge Devidts' collection of vintage electronic calculators and some other pieces of old technology.
	Curta Calculating Machines - http://www.teleport.com/~gregsa/curta/ Links to useful sites about the Curta. Also documents the full disassembly of one, with pictures.
	HP Collection - http://www.hp-collection.org/ Matthias Wehrli's collection of HP calculators and accessories. Includes photographs and specifications for items in the collection.

	The Famous Slide Rule Page - http://www.geocities.com/ResearchTriangle/Forum/7787/sliderule_collecting.htm Pictures and descriptions of The Castell Addiator and The Rapid-Calcolo.
	Old HP and TI Calculators - http://www.rskey.org/gene/hpgene/ Photographs and information about HP and TI calculators, including many programs.
	Electronic Calculator History and Technology Museum - http://www.classiccmp.org/calcmuseum/calc.htm Preserving the history of electronic calculators with information and photographs of early desktop and pocket calculators.
	Reverse-Engineering the HP-75C - http://www.fortitudine.com/~coryc/html/hp75c.shtml General information about the HP-75C.
	Collection of Calculators, Portable Computers and Vintage Electronics - http://web.tiscali.it/city/ Calculators from the '70s, and famous home and personal computers from '80s. Photos, historic information and links to other resources.

	Stellatron Calculators - http://website.lineone.net/~lineup/st-pages/calcmain.html An A-Z index of manufacturers, with product photographs, and a timeline of model releases.
	Gregory Escov's homepage - http://members.tripod.com/GregEscov/ Some articles about Russian made calculators, including undocumented features and error conditions.
	Casio FX-700P Programmable Calculator - http://www.pisi.com.pl/piotr433/index.htm Technical information about hardware, interfacing, and programming of this vintage device. Includes a construction project for a storage device to emulate the original FA-3 cassette interface.
	Calculator Collecting - http://k.webring.com/hub?ring=calculator Webring designed to allow navigation between similar sites dealing with the hobby of collecting, and history of electronic calculators.
	Anita Calculator Simulators - http://www.lyvedon-way.fsnet.co.uk/calc/CALC.HTM A collection of Sumlock Anita calculators and simulators, and related devices associated with the Sumlock factory in Portsmouth, UK, in the 60s and 70s.

	Using and Collecting HP Calculators - http://membres.lycos.fr/hpcalc/ Information about various HP calculator models, with photographs. Includes instructions on using some of the special functions of some models.
	Yahoo! Groups : oldcalcs - http://groups.yahoo.com/group/oldcalcs/ Bulletin board for collectors of old electronic calculators.

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