Home > Update Information

Minor updates to this site are constantly being made, especially new additions to the Photo Library. Listed here are the more significant updates:

4th May 2013

• Added CB-888 to the Monte Carlo and similar tiny calculators page.

15th December 2012

• Added Elektronika B13-18A to the Featured Hand-held Calculators section.

2nd October 2012

• Added Calcutronic/Abatron 802 to the Abatron page in the British Calculator Companies section.

2nd July 2012

• Added Tealtronic K-80M (type 2) to the Tealtronic page in the British Calculators section.

16th June 2012

• Added NCR 1844 to the Busicom LE-100A page.

11th May 2012

• Added TEC EC-205G to the Sharp EL-825 page.

11th February 2012

• Added Sanyo CX-1 to the Featured Hand-held Electronic Calculators page.

4th February 2012

• Added page "Later Hand-held LCD Calculator Photograph Library".

28th January 2012

• Added Victor 3900 to the Featured Electronic Desktop Calculators page.

2nd January 2012

• Added Unifive Industries data brain II to the One Hit Wonders page, and Binatone CADET to the British Calculators section.

31st December 2011

• Added Binatone MEMORYMASTER, Decimo Handy, House of Fraser 44HF, Imperial 92M, Texet 1500, and Texet Secretary to the British Calculators section.

30th December 2011

• Added Radofin 1720 to the Check, Billfold, and Wallet Calculators page.
• Added Iain Jones International Phoenix 101 to the One Hit Wonders page.

29th December 2011

• Added BOND calculator to the Monte Carlo and Similar Calculators page.
• Added Litronix Checkmate version 2 to the Litronix Checkmate page.
• Added RES MARK IX to the One Hit Wonders page.

26th November 2011

• Added Ultramat SQR-2000 prototype electronic calculator to the Featured Desktop Electronic Calculators section.

16th November 2011

• Added Walther ETR3 to the Featured Hand-held Calculators section.

20th August 2011

• Added new article "SCAT and its Specialist Calculators: How a start-up company formed by a group of friends developed a successful series of advanced specialist calculators".

6th August 2011

• Added new section Hexadecimal & Octal Calculators to the Non-Decimal Calculator section, with the Octdat, Hexadat, and Texas Instruments Programmer.

30th July 2011

• Added the Olivetti Divisumma 18 to the Featured Hand-held Calculators section.
• Added the Sinclair Cambridge Calculator Kit to the Sinclair Cambridge page and the Sinclair Scientfic Calculator Kit to the Sinclair Scientfic page.

27th June 2011

• Added the Sharp EL-8008 to the page about Sharp reflective-LCD calculators.

30th May 2011

• Added the Sharp EL-826 early solar-cell powered calculator.

14th May 2011

• Added more information to the pages about the Sharp EL-8026 and Sharp EL-825 solar-cell powered calculators.

29th December 2010

• Added Prinztronic C20, Prinztronic Numberman M MEMORY, and Prinztronic SC1001M to the British Calculators section.

11th September 2010

• Added information about the Old Calculator Forum to the Calculator Forums page.

31st August 2010

• Added Decimo Super Vatman V.Sc. I to the British Calculators section.

14th August 2010

• Added aml LE-8 "TRAVELLER" to the British Calculators section.

31st July 2010

• Added Gemini 3 to the British Calculators section.

13th July 2010

• Added new article "The Twin Marchant and its place in history" to Collecting Calculators section.

12th June 2010

• Added information about the Twin Marchant to the Notes on Monroe and Marchant Calculators article.

5th June 2010

• Added Gross 681 amd Imperial 12HT to the British Calculators section.

1st June 2010

• Added Litronix Checkmate and Monroe 10 to the Featured Hand-held Calculators section, Busicom Colex 812-SL to the British Calculators section.

3rd May 2010

• Added Sinclair Executive to the Old Calculator Advertisements page, and Advance Executive 16+2 to the British Calculators section.

24th April 2010

• Added Iain Jones International Mini to the One Hit Wonders page.

13th April 2010

• Added Hapco Porta Mark II to the One Hit Wonders page.
• Added Texet 1200 Student to the British Calculators section.

16th February 2010

• Added page Calculator Keyboard Layouts to the Calculator Technology section of this site.
• Added information about the Busicom HANDY LC LCD calculator.
• Added Gemini 1B to the Gemini page of the British calculators section.

16th January 2010

• Added Museum Calculator Displays page to the Calculator Resources section.

29th December 2009

• Improved and added more photographs to the page "The Pocket Calculator Race", and more emphasis placed on the development of the pocket calculator.

19th October 2009

• Added a page on Binatone calculators and also added the Ajax, Ajax 99, Decimo International (type 2) to the British calculators section.

19th September 2009

• Added the Fi-Cord MF 8 to the British calculators section.

13th July 2009

• Added Commodore N-60 and Tamaya NC-2 to the Navigation Calculators page.

14th June 2009

• Added information about the manufacturer of Regan calculators and recollections of manufacturing and inspecting hand-held calculators at Advance Electronics.

4th May 2009

• Added Hewlett Packard awarded the "IEEE Milestone in Electrical Engineering and Computing" for the HP-35 calculator to the Latest Vintage Calculator News section.

25th April 2009

• Added Busicom 141-PF / NCR 18-36, the first commercial product to incorporate a microprocessor, the Intel 4004, to the Featured Desktop Electronic Calculators section.
• Added "The calculator that spawned the microprocessor - The Busicom 141-PF calculator and the Intel 4004 microprocessor" to the Collecting Calculators articles.

10th April 2009

• Added Sharp PC-1210 Pocket Computer to the Featured Hand-held Calculators section.
• Added Radofin 1515 to the British Calculators section.

7th March 2009

• Added Comptometer Model-J Imperial-weight calculator to the Non-Decimal Calculators section.

26th February 2009

• Improved the early hand-held calculators in the Featured Hand-held Calculators section, added link to the World of Calculators Forum, the successor to the Vintage Calculators Forum, in the Calculator Forums Section.

21st February 2009

• Added Berkey Keystone 350 to the Featured Hand-held Electronic Calculators section.

8th February 2009

• Added Genie 247 and Sporting Life Super Settler to the page about betting-shop calculators in the Featured Desktop Electronic Calculators section.

2nd February 2009

• Added information about the history of Advanced Telecommunications Equipment (ATE) and updated the page about Radofin in the British calculators section.

31st January 2009

• Added aml Distributors Ltd. to the British calculators section.

17th January 2009

• Updated and expanded the Calculator Books section.

29th December 2008

• Added the Memory Devices Memory 808MD to the British calculators section.

9th December 2008

• Added the Texas Instruments "Cal-Tech" prototype to the Hand-held Calculator section.

1st November 2008

• Added ADDO Mod 9 to the British Calculators section.

27th August 2008

• Added information about the National Mueum of Computing at Bletchley Park, England.

8th August 2008

• Added page about Bletchley Park.

26th July 2008

• Added the news that the Museum of Computing, in Swindon, has been made homeless.

19th July 2008

• Added Caltec, Data Devices, and Tealtronic to the British Calculators section.

15th May 2008

• Added link to YouTube videos of old advertisements for calculators.

10th May 2008

• Added Sperry Remington SSR-8 and added Prinztronic M300 to the British Calculators section.

5th May 2008

• Added Casio AL-8S and added Plustron 908 to the British Calculators section.

22nd March 2008

• Added Prinztronic 4 and Prinztronic Scientific SC5001M to the British Calculators section.

17th March 2008

• Added SCAT THE DIMENSION feet & inches electronic calculator.
• Added page on Abatron calculators to the British Calculators section.

16th February 2008

• Added Calate 8 to the British Calculators section.
• Added Gemini 1 to the British Calculators section.
• Added Prinztronic 1001m and Prinztronic Program to the British Calculators section.

2nd December 2007

• Added Prinztronic SC2001m to the British Calculators section.

6th October 2007

• The enlarged 5th. edition of the "Guide to HP Handheld Calculators and Computers" published added to Vintage Calculator News section.
• Added Imperial 80CS, Imperial 81CS, and Imperial 1030 to the British Calculators section.

22nd September 2007

• Added Sharp EL-8026, the first calculator to use solar cells.
• Added Texet Pocket-8M and Texet Pocket-8MR to the British Calculators section.

15th September 2007

• Added page TI 58 Special Function Calculators.
• Added Sandvik Coromant 842S Cutting Data Calculator.

18th August 2007

• Added Decimo Da Vinci to the British Calculators section.
• Added Prinztronic Mini Scientific to the British Calculators section.
• Added Radofin 2200 style 2 to the British Calculators section.

11th August 2007

• Added Gemini 2 to the British Calculators section.
• Added Radofin 1640 to the British Calculators section.

4th August 2007

• Added Novus Billfold 91 to the Check, Billfold, and Wallet Calculators page.

28th July 2007

• Added photograph of Casio Mini-Card LC-78G to the Mini-Card LC-78 page.

24th July 2007

• Hewlett Packard launches Retro HP 35s to Commemorate 35th Anniversary of First HP Handheld Calculator added to Vintage Calculator News section.
• Added photographs of MITS 908M, MITS 941M "Metric Converter", and MITS 1212 to MITS 150 page.

16th June 2007

• Added Cybio 004m.

29th May 2007

• Added Kosmos Astro.

27th May 2007

• Added new section Early Hand-held LCD Calculators Photo Library.

14th April 2007

• Added Decimo International to the British Calculators section.

9th April 2007

• Added Addo-X 9364 to the Sharp EL-8 page.
• Added Decimo Super Vatman M to the British Calculators section.
• Added Miracal to the One Hit Wonders article.
• Added Plustronic LE-806 to the British Calculators section.
• Added an Unknown Scientific Model to the Edmund Scientific 1945 & Similar Models page.

31st March 2007

• Added Imperial 94F to the British Calculators section.
• Added Plustron Educational 1 to the British Calculators section.

24th March 2007

• Added General Instrument to the Calculator Companies section.
• Added General Instrument EZ3000 and varities to the Featured Hand-held Calculators section.
• Added RBM Scientific to the One Hit Wonders page.

21st March 2007

• Added Decimo Vatman Spy to the British Calculators section.
• Added Prinztronic Micro II to the British Calculators section.

8th March 2007

• Added Geller (Business Equipment) Ltd., and the Geller Teal LE-8 to the British Calculators section.

24th February 2007

• Added Edmund Scientific 1945.

17th February 2007

• Added Calate Supacal and information about its manufacturer Advanced Telecommunications Equipment Ltd. (ATE) to the British Calculators section.

14th February 2007

• Added more photographs of the first pocket calculator the Busicom handy LE-120A.

29th December 2006

• Added Links to Vintage Technology Sites page.

8th November 2006

• Added the GEM calculator to the Addiators page.

14th October 2006

• Added extra information to the page about Rockwell and its calculators.

2nd September 2006

• Added Quik-Check wrist calculator.

29th May 2006

• Added new article "One Hit Wonders" to the Collecting Calculators section.
• Added Casio fx-10.
• Added Litronix Inc. to the Calculator Companies section.

13th May 2006

• Added Elorg 801 calculator from the U.S.S.R.
• Added Texas Instruments SR-10 electronic "Slide Rule".
• Added Texet Student to the British Calculators section.

7th May 2006

• Added Monte Carlo calculator.
• Added Decimo 2001-e, Decimo Super Vatman SS. I, Decimo Vatman Extra M, Decimo Vatman Extra S, and Decimo Vatman Student added the British Calculators section.
• Added all-black Sinclair Executive Memory.

1st May 2006

• Added Bowmar MX-55 & Hiradastatechnika Hungarian-made version.
• Added Sharp EL-8009, Sharp EL-8009S, Sharp EL-8015, and Sharp EL-8110 to Sharp EL-805 and other early Sharp LCD calculators page.
• Prinztronic 810N added.

17th April 2006

• Century Mark IV and Rockwell Anita 1216 added to Puzzle Corner.
• Page about Ajax calculators added to the British Calculators section.
• Added Radofin 1610, Radofin 1660, Triton 1000, and Triton 1400 to the Radofin page in the British Calculators section.

15th April 2006

• Allianz insurance calculator.
• Commodore C110.
• Slide rule.

8th April 2006

• Added Prinztronic models: c-mos 1, Financial, M500, MC99, Powerman.

27th March 2006

• Panasonic JE-8210U "Electronic Ruler" added.

11th March 2006

• History of Gross Cash Registers Ltd. added.
• Photographs of some of the displays at the Museum of Computing calculator exhibition added.

24th January 2006

• Details of Museum of Computing calculator exhibition added.

30th December 2005

• Decimo Vatman Scientific - added.

28th December 2005

• NCR 18-15 - added.
• Sharp EL-805 - added.

24th December 2005

• Added addional information about the pioneering calculator developments to the page about Sharp Corporation in the Calculator Companies section.

4th December 2005

• Added new section "Latest Vintage Calculator News".
• Added details of the award of IEEE Milestone in Electrical Engineering and Computing to Sharp Corporation.

15th October 2005

• Prinztronic LE-808P - added.
• Taktile 1200 - added.

8th October 2005

• Hanimex Calculator-Recorder - added.

1st October 2005

• Addo-X 9675 - added.

25th September 2005

• Texas Instruments TI-2511 - added.

21st September 2005

• Ramsgate M-11 - added.

13th August 2005

• Casio Mini Card LC-78 - added.
• Decimo Vatman Mini M - added.
• Decimo Vatman V.Sc I - added.

6th August 2005

• Boots 224 Memory and 425 Scientific - added.

26th July 2005

• Further photographs of inside the Anita Mk VII - added.

23rd July 2005

• Advance Electronics Ruby 800 - added.

18th July 2005

• Sinclair President Scientific - added.
• Photographs of the circuit boards and display modules of the Canon Canola 130S - added.

30th May 2005

• Canon Canola 130S - added.
• "Light-pipe" numerical display modules - added to Calculator Displays page.

15th May 2005

• Calculator Time-line - improved.

7th May 2005

• Imperial 81SR - added.

3rd May 2005

• Elektronika MK-33 - added.

2nd May 2005

• Announcement in 1961 about an electronic calculator from Electrosolids Corporation reinstated to the site now information is available.

30th April 2005

• Decimo Ready Reckoner - added.
• Plustron 508 and 608 - added.

26th April 2005

• Plustron fleximind, hand held calculator and game - added.

16th April 2005

• Page about Marchant Calculating Machine Company added.

6th April 2005

• SEC Navtronic and Texas Instruments Navigatronic - added.

2nd April 2005

• Hanimex BC 808 - added.

28th March 2005

• Thumbnail images added to the Calculator Photo Library.

24th March 2005

• Royal Digital III - added.

30th December 2004

• Bohsei 3000 and Goodyear G191 - added to "Standard Type 1" page.
• Decimo Handy M - added.
• Decimo Vatman Executive, LED version - added.

19th December 2004

• Readers' Queries section - added to the Puzzle Corner page.

24th November 2004

• Busicom "exec" 80-DA - added to the Busicom page.
• Gross 2031 - added.
• Teal LE-8 President - added to the Teal page.

2nd October 2004

• Casio ST1 - added.

19th September 2004

• An improved Site Search Engine - added.
• Unknown small calculator - added to UIT 85X page.

14th September 2004

• MITS 908M - added.
• Resulta - added.
• S & N / THE SUN adding machine - added.

19th July 2004

• Busicom LE-120A "HANDY-LE" - added.
• Calculator by Unknown Manufacturer - added to "Puzzle Corner".

24th June 2004

• Addmaster Indian currency calculator - added.

15th June 2004

• Busicom LE-80A "handy" - added.
• Facit 1106, Sharp EL-808, Sharp EL-8010 - added.

22nd May 2004

• Advertisement page moved to Photo Library section and more advertisements being added to it.

11th May 2004

• Prinztronic M800 - added.
• Prinztronic P200 - added.

8th May 2004

• House of Fraser 14HF - added.

3rd May 2004

• Phytron 32 - added.

18th April 2004

• Toshiba BC-1623G - added.

13th April 2004

• New major section "Calculator Companies" created.

9th April 2004

• Busicom LE-100A - added.
• Sporting Life Super Settler Mk II - added.
• Photographs of the circuit board of the Sinclair Sovereign added.

29th February 2004

• Busicom 802 - added.

21st February 2004

• Gemini 3 - added.

18th January 2004

• Busicom LE-120S "handy" - added.
• Sharp QT-8B "micro Compet" - added.

10th January 2004

• A brief history of Muldivo added to the Muldivo page.

28th December 2003

• Iain Jones International Addison Mini A - added.

26th December 2003

• Exactus Mini-Add - added.
• Prinztronic 80 - added.
• Prinztronic Countdown - added.
• Sperry Remington 661 - added.
• Teal Photon - added.

16th December 2003

• Rapid Data Rapidman 1208LC - added.

13th December 2003

• Adler Sir - added.
• Hewlett-Packard HP-80 - added.
• Sinclair President - added.

8th November 2003

• Operating manual for the Muldivo Mentor pinwheel calculator - added.

18th October 2003

• Triton 8 - added.
• Triton 1200 - added.

7th October 2003

• Plustron 808 - added.

27th September 2003

• Check Tronic and Corvus CheckMaster - added.
• Decimo Memory Man - added.
• Decimo Vatman Super Spy - added.
• Monroe LN-160X - added.
• Sinclair section improved.

9th August 2003

• Canon LE-10 - added.
• Sanyo ICC-808 - added.

5th August 2003

• Prinztronic MC95 - added.

2nd August 2003

• Sinclair Cambridge type 4 - added.

26th July 2003

• Pulsar calculator watch - added.

22nd July 2003

• NCR 18-16 / Busicom Junior - added close up of the Mostek 6010 "Calculator on a chip".
• Sinclair Oxford Universal - added.
• Summit K16 / Citaco K16 - added.
• Texas Instruments TI-2500 "Datamath" - page rewritten, including comparison of "Datamath" versions.

5th July 2003

• Busicom 100DA - added.
• Busicom 118B - added.

26th May 2003

• Article "Clive Sinclair and the Pocket Calculator" - added.

17th May 2003

• Sinclair Wrist Calculator - added.

6th May 2003

• Burroughs C5205 - added.
• Imperial 99T - added.
• Teal TL-2M - added.

29th April 2003

• Muldivo AE - added.

19th April 2003

• Decimo Vatman V.Sc. II - added.
• Golden Gem adder - added.
• Child's Teaching Speaking Calculator - added.
• Texas Instruments Spirit of '76 - added.

12th April 2003

• Minolta Minolcom - added.

28th March 2003

• Operating a "Comptometer" - added.
• Casio AL-10 - added.
• Sanyo ICC-0081 "Mini Calculator" - added.
• Strand Memory - added.

17th March 2003

• Imperial 91K - added.
• Prinztronic 400 - added.
• Prinztronic 8000 - added.
• Prinztronic Director MC 1000 - added.

8th March 2003

• Calculator Photo library - reorganised and expanded.

25th February 2003

• Announcement of Electrosolids Corp. transistorised desk calculator - added - now removed.
• Philips Prototype Transistorised Electronic Calculators - added.

8th February 2003

• Casio AL-1000 - added.
• Calculator Memory Technologies section - added.

29th January 2003

• Details of memorizer units to convert Sharp Compet 22 to programmable - added.
• Additional information added to The Calculator Business section.

18th January 2003

• Anita calculators moved to the associated site "Bell Punch Company and the Anita Calculators".

14th December 2002

• Rockwell 20R - added.
• Plus Imperial-weight calculator - added.

19th November 2002

• House of Fraser 18F - added.
• House of Fraser 30F - added.

16th November 2002

• Frequently Asked Questions - Section "Estimating the Age of a Calculator" expanded and renamed.

12th November 2002

• Site Search-Engine - added. Note, browser must support javascript. It takes a little time to load the index file, but after that searches are fast. - This version removed 18th. Sept. 2004.
• Desktop Electronic Photographic Library started.
• Royal IC-130 - added.

26th October 2002

• Advance 162P - added.
• Guy's Britannic - added.

15th October 2002

• Busicom Colex 122B - added.
• Plustronic 636 - added.

9th October 2002

• Photographs of Anita 1010 - added.
• The Video Games & Home Computers History Award for October 2002 - added to Home page, and the Video Games and Home Computers site at the Dot Eaters and Number Crunchers Museum added to the links page.

28th September 2002

• Comptometer 993m - added.

16th September 2002

• Ragen Microelectronic Calculator - added.

14th September 2002

• Major update to the Calculator Book addendum.

25th August 2002

• Rockwell/Anita 1211 - added.

12th August 2002

• Operating a Pinwheel Calculator - added to the "Collecting Calculators" section.

10th August 2002

• Prinztronic Micro - added.
• RFT minirex 75 - added.
• Sanyo IC-1122 - added.
• UIT 85X - added.

3rd August 2002

• Sharp PC-1211 (Tandy TRS80 PC-1) pocket computer - added.

20th July 2002

• Bandatronic invoicing system - added.
• Decimo Ltd. - extra information about the company added.

25th June 2002

• Anita: the world's first electronic desktop calculator - A brief history of the complex Bell Punch company and its calculators - article added.
• Busicom of Japan and Broughtons of Bristol - Pioneering calculator company and the company which carries on the name - article added.
• Anita Mk8 - extra photographs added.
• Brunsviga 10 - added.
• Sharp EL-120 - added.

8th June 2002

• Anita Mk8 - extra photographs added.
• IME 26 - added.
• IME 84rc - added.
• Hewlett-Packard HP-65 - added.
• Mullard low-cost electronic calculator - added.
• Rockwell-Anita 811 SL - added.

13th April 2002

• Third Sinclair Cambridge type - added.

1st April 2002

• Section 6) "Collecting Calculators" - transferred to this site.
• Sharp QT-8D - added.

25th February 2002

• Addfeet Junior - added.
• Facit 1111 - added.
• Feet & Inches Addometer - added.
• PLUS 509/T/828599 - added.

26th January 2002

• Atlas-Rand 240 - added.
• Berkey/Omega 100 - added.
• Keystone 88 - added.
• Sinclair The Sporting Life SETTLER - added.
• Book "Antique Office Machines: 600 Years of Calculating Devices" - added to Calculator Resources section.

5th January 2002

• Boots 424 Scientific - added.
• Canon Multi 8 - added.
• Casio AL-8 - added.
• Commodore C108 - added.
• Commodore S61 - added.
• Decimo Vatman Memory - added.
• Decimo Vatman Mini - added.
• Decimo Vatman Mini II - added.
• dsc CAL-0041 - added.
• Geeta 3000 - added.
• Imperial Companion - added.
• Kingson Four-Rule Calculator - added.
• King Sonic - added.
• Kosmos I - added.
• Meir 880 - added.
• Mustang 3000 - added.
• Okhai 8P - added.
• Prinztronic 99P - added.
• Prinztronic Micro 8 - added.
• Prinztronic SC1500M - added.
• Prinztronic X15 - added.
• Radio Shack EC-220 - added.
• RJP 880 - added.
• Rockwell 9TR - added.
• Royal Digital 5-M - added.
• Royal Digital 5-T - added.
• Texas Instruments TI-30 - added.
• Texet 800M - added.

24th September 2001

• Addometer - added.
• Adler Lady - added.
• Sumlock Imperial Weight Calculator - added.
• Calcu-pen - added.
• Elektronika C3-15 - added.
• Elektronika MK57A - added.
• Elektronika MK61 - added.
• Imperial 1010 - added.

31st July 2001

• Casio Mini - replaces the Casio Mini CM-602.

28th July 2001

• Anita 831 - added.
• Imperial 81M - added.
• Imperial 90S - added.
• Imperial Office Master Electric - added.
• Texet 880 Executive - added.
• Texet Scientific 2001 - added.

14th July 2001

• Lloyd's Accumatic 100 - added.

8th July 2001

• Addometer - added.
• Summit Ko9V - added.
• Victor 85 "Tallymate" - added.

23rd June 2001

• Sinclair Cambridge type 2 - added.
• Sumlock Comptometer 993s - added.
• "The Calculator Business" - section started.

16th May 2001

• Casio AS-C - added.
• Olympia CD200 - added.
• Calculator Electronics section expanded.
• Information required on Integrated Circuit Manufacturers added.

1st May 2001

• IME 84 - journal announcement added.

28th April 2001

• Elka 101 - added.
• Rockwell Anita 201 - added.

21st April 2001

• Advance Executive - added.
• Prinztronic MC85 - added.
• Prinztronic P800 - added.
• Ricoh RICOHMAC 1200 - added.
• Sinclair Oxford 150 - added.
• U.S. and GB. patent dates added to Estimating a Calculator's Age.

31st March 2001

• Advance/Wireless World kit calculator - added.
• apf Mark V - added.
• Royal Five GT - added.

26th March 2001

• Imperial 860 - added.

12th March 2001

• Heathkit IC-2009 - added.
• Imperial 1020 - added.
• Imperial Special - added

17th February 2001

• Original Odhner - added.

1st January 2001

• Compuchron calculator watch - added.
• Speech+ - added.
• Calculator Technology pages added.
• Estimating a calculator's age pages added.

28th November 2000

• Anita section - updated.
• Anita 1000 - added.
• Anita 1010 - added.
• Anita 1011P - added.
• Anita 1021 - added.
• Anita 1211P - added.
• Anita 1233D - added.
• Anita 1233P - added.

25th November 2000

• Anita section - updated.
• Anita Mk 9 - added.
• Anita Mk 10 - added.
• Anita Mk 11 - added.
• Anita Mk 12 - added.
• Links to Soviet calculator sites added.

11th November 2000

• IME 84 - added.

28th October 2000

• "British Calculators" section improved.

21st October 2000

• Many small information updates and enhancements.

10th October 2000

• Novus 650 "Mathbox" - added.

26th September 2000

• Anita 1011 - Photographs and information added.

28th August 2000

• Texas Instruments TI 58 & USMC Harrier/AV8-A calculator added.

27th August 2000

• Hitachi KK521 added.
• Otis King Model L added.
• Tamaya NC-77 added.

26th August 2000

• Casio Mini added.
• Olympia CD 81 / Panasonic JE-855U added.
• Sharp EL-825 added.
• Sinclair Executive Memory added.
• Section on Texet starting to be added.

20th August 2000

• Busicom models starting to be added.
• Imperial and Royal models starting to be added.
• Brother PRO-CAL 408 added.
• Unicom 102 added.

9th August 2000

• Curta I added.
• Rapidman 800 added.
• Links to calculator forums added.

5th August 2000

• Hand-held Calculator section added, Mechanical Calculators re-arranged for clarity.

30th July 2000

• Home page and Electronic Desk Calculators re-arranged for clarity.

25th July 2000

• Transfer to new site www.vintagecalculators.com.

19th July 2000

• Memory Devices ESR-817 added.
• House of Fraser 24HF added.
• Prinztronic MC66 added.
• Prinztronic SR88M added.
• Prinztronic XJS added.
• Pye P-630 added.

15th July 2000

• British Calculators page and company details re-arranged for clarity.

8th July 2000

• NCR 18-16 (re-badged Busicom Junior) added. First use of "calculator on a chip".
• More information added to the Sumlock Anita history, and to the Anita model list.
• A history of Broughtons of Bristol and Busicom Business Machines added.

3rd June 2000

• Sinclair Radionic added.
• Links added to Ernie Jorgenson's and Christofer Nöring's sites.
• Correction to the incorrect link from the Home page to the first Sterling currency page which has crept in at some time.

13th May 2000

• Brunsviga Adsum 94T added.
• Imperial Office Master added.
• Plus (Bell Punch/Sumlock) 506/D/815.357 added.
• Sinclair Enterprise added.

29th Apr. 2000

• Pye P-650 added.

8th Apr. 2000

• Sinclair Sovereign added.

26th Mar. 2000

• Anita Mk VII added.
• Index added.
• Calculator Time-line added.

11th Mar. 2000

• Anita 811 added.
• Sinclair Cambridge added.
• Radio Shack EC-4001 added
• Close-up of Sterling Comptometer keyboard added.
• Photograph of Anita Mk VIII added.
• Links page added.
• Many minor changes.

21st Jan. 2000

• Initial posting.

Vintage Calculators

© Text & photographs copyright Nigel Tout   2000-2012 except where noted otherwise.