The Old Calculator Web Museum Acknowledgement and Thanks Page

Last Updated 2/1/2017

This page of the Old Calculator Web Museum is here to give acknowledgement and thanks to all of those who have contributed to help the museum. Without the help and assistance of these people and many others, much of what the museum is would not have been possible.

First and foremost, I need to thank my infinitely (well, almost :-) patient and tolerant wife, Patty, for putting up with all of my "stuff". For years, I've been lugging around these machines, and in earlier times, they would occupy some places that weren't very "wife-friendly". Over the many years, Patty has dealt with plugging IC's into the bottom of her bare foot when I left some laying on the floor upside down (OUCH!); stepping on a hot soldering iron that I left sitting on the floor (double OUCH!); having calculators clogging up space in various rooms of the house that weren't really intended for calculators, and being really helpful (and patient) during moves when we have to haul all of this stuff around. On top of all of that, she's dealt with "calculator widow" syndrome (when I disappear for hours over at the museum) with lots of understanding. She knows I'm a bit of an eccentric, but still loves me anyway! Thank you, Patty!

Not everyone who has helped out over the course of the development of this museum is listed here. There are truly countless folks who have contributed in many ways, including many EMails of support, updates and corrections, and additional information that has always been very helpful. Others have contributed information and documentation to the museum, things such as advertisements, sales materials, and other material that adds to the collective of knowledge contained here. To all of these folks, I extend my sincere gratitude. This list of folks is not in any particular order. Each and everyone in this list has contributed in a significant way to making the museum what it is today.


Prof. Hisaki Goto, Kyushu Sangyo University, Japan
Professsor Goto donated a fantatic Busicom 207 calculator to the Old Calculator Museum in mid-2016. Professor Goto used this calculator back in the laet 1960s through early 1970's as an educational tool to teach the concepts of computer programming. After it had become outdated, it was relegated to a storage closet, and remained there for all these years. When the university was to move to a new location, faculty and staff were tasked with disposing of unused or surplus equipment, and fortunately, Professor Goto found the Old Calculator Museum and offered the machine as a donation rather than simply tossing it away. This rare and unusual calculator was designed for Busicom by Wyle Laboratories in the US. Busicom contracted with Wyle Laboratories to develop the machine, which was a follow on to the Wyle Labs-designed Busicom 201. The calculator arrived safely from its trip across the Pacific with no issues. The machine is in nice physical condition, but has some electronic issues which are in the process of being diagnosed and hopefully repaired. It generates a clean display on the CRT, but does not respond properly to keypresses. The museum wishes to thank Prof. Goto, and Kyushu Sangyo University for this amazing donation.

Lynn Cochran
Mr. Cochran kindly donated a Philips P252 and Philips P251 electronic calculators, along with the dot-matrix print mechanism from another P249/P251/P252 calculator. Mr. Cochran visited the museum and personally delivered the machines. The P252 is in nice physical condition, and with a little work, looks to be able to be made fully functional. The P251 is in non-restorable condition, but is useful, as a number of the circuit boards are identical between the P252 and P251, as well as other boards being a possible source for spare ICs and other components. The spare printing unit is also a wonderful thing to have for spare parts. Sincere thanks to Mr. Cochran for his kind donations.

Mr. Alfredo Logioia
Mr. Logioia contacted the museum indicating that he had purchased a Victor 4900 programmable electronic calculator in extremely nice, fully operational condition, and along with it, he got the user's manual and programming manual for the calculator. He offered to scan the documentation and provide the scans to the museum so that they could be shared with other calculator enthusiasts. Since then, the museum has provided these documents to a number of Victor 4900 owners who have been grateful to be able to have documents to go along with their machines. Sincere thanks to Mr. Logioia for making these nicely scanned copies of these documents available to the museum, as well as to the calculator interest community in general.

Edward Scheffelin
Mr. Scheffelin, though his son, Tom, donated a nice Compucorp 344 calculator along with power supply, carrying case, and manual to the museum. Edward used this calculator for many years in his work, taking great care of it. It was evenually given to his son, Tom, who provided the machine and accessories to the museum on behalf of his father. Thanks to both Edward and Tom for allowing the Old Calculator Museum to become the new home for this wonderful vintage calculator.

Mr. Charles L. Smith
Mr. Smith worked for Monroe Calculator Co. beginning in 1970 through around 1976. He attended training schools for a number of Monroe's Canon-made desktop electronic calculators, including classes for the Monroe 920 and Monroe 925. Charles donated a large cache of original Monroe service and training documentation for the 920 and 925 calculators, along with Monroe service bulletins for these and the Monroe 950, and Monroe 990 calculators. The documentation includes logic diagrams, timing diagrams, circuit board layouts, parts lists, and troubleshooting/repair guides. The museum will endeavor to scan and put as much of this documentation online over time.
Along with the donation of documentation, he also donated a Monroe 920 calculator in good, fully operational condition. Charles shared a number of interesting stories about problems with the 920 and 925 calculators, which were manufactured in Japan by Canon, and sold and services in North America by Monroe. There were major problems with intermittent connections in the machines that caused service nightmares because the problems were very difficult to track down and repair. A settlement was finally made where Canon provided flow-soldering machines to Monroe's service center in Orange, NJ, and calculator circuit boards were re-soldered. Sincere thanks to Charles for his generous donations to the Old Calculator Museum.

Mr. Bill Ewing
Mr. Ewing took a job at Victor Business Machines back in 1975, fresh out of the Navy. He worked for Victor his entire career, and is now retired. Bill happened across the Old Calculator Museum's exhibit on the Victor 4900 calculator, and it struck him that he still had some Victor stuff left over from his work days -- a programming manual for the 4900, and some magnetic cards for the 4900 calculator. He contacted the museum and graciously offered the programming manual and magnetic cards to the museum as a gift. The materials were received in wonderful condition. The programming manual will be instrumental in further documenting the amazing capabilities of the 4900. At some point, when time permits, the magnetic cards, contained in a little envelope marked GAMES could be very interesting to try reading into the museum's 4900, and see if they are still readable and functional. Any findings will be added to the 4900 exhibit. Sincere thanks for Bill for his generous contribution to the museum.

The Estate of Mr. Al Swing
Mr. Swing had a long and rewarding career with Fluor, a global engineering firm, before retiring as a Piping Material Engineering Group Supervisor. His experience encompassed dozens of major engineering projects in the US and abroad. His daily workplace calculator was a Monroe(Litton) Model 1920, donated by his family to honor a man that appreciated the wonder of such technology and that utilized it to help build great things.

Dr. Mohamad Hassoun
Mohamad contacted the museum back in 2010, and over the years, we have come to discover how we are both so passionate about old calculators. This shared passion has lead to a close friendship. In 2013, Mohamad made a visit to the Old Calculator Museum, and we had a wonderful time together tinkering with some machines, including repairing a Victor 13-322 that had developed a problem. Over the years, Mohamad has supported the museum with greatly appreciated donations including a beautiful Addo-X 9958, various parts to support the repair of machines in the museum, as well as sharing of documentation that he's found. Mohamad is a great friend, and we will continue to share our passion for these wonderful old machines as long as we're able. Thank you for everything, Mohamad.

Bob Pomerleau
Mr. Pomerleau contacted the Old Calculator Museum in April of 2014 indicating that he was employed by Wang Labs from 1969 to 1981, and that he had a Wang C-50 calculator that was used daily in his job since during the mid-1970's, and when he left Wang, he was given the calculator. It ended up being saved in a closet all these years, and he pulled it out as he was in the process of moving, and fired it up, and low and behold, it still worked. He found the Old Calculator via a web search, and offered the machine as a donation to the museum. The machine was received, and while a little grubby after all these years, is in good condition and works perfectly. We will be working to get an exhibit for this great old artifact online as soon as possible. Sincere thanks to Mr. Pomerleau for his kindness in donating his old calculator to the museum.

Supply New England/Ms. Kimberly Perry-Ford
The Old Calculator Museum wishes to thank Ms. Kimberly Perry-Ford of Supply New England, a wholesale heating and plumbing supply company in Attleboro, MA. Ms. Perry-Ford contacted the museum in October of 2007, indicating that she had an old Sharp EL-160 calculator that was used by the founder of the company, Mr. John Reardon. The EL-160 was purchased new, and used by Mr. Reardon to perform the financial calculations for his company until the 1990's, when he retired from his role, though he was still the Chairman of the Board of Directors, which we stepped down from in late 2007. Ms. Perry-Ford found the Old Calculator Museum when searching for information about the old calculator, and offered the machine to the museum as a donation, which we gladly accepted. Mr. Reardon was pleased to hear that his calculator was to be preserved by the Old Calculator Museum.

Susan & Dave Rosko
Susan contacted the Old Calculator Museum in early January, 2012, indicating that she had seen a listing on the museum's Wanted page indicating that the museum was looking for the May, 1967 edition of Radio Electronics, which featured an article on the new "up and coming" electronic calculators. Inclded in the magazine article are the Mathatronics Mathatron, Canon 161, Monroe EPIC-2000, SCM Cogito 240SR, Dero Sage I, IME 86, Wyle WS-02 Scientific, Victor 3900 and the Wang 360E "desktop computers". Susan's father, Wesley White, was an electronics enthusiast, and had a collection of old electronics magazines that Susan took posession of when her father passed away. She found the magazine that the museum was looking for in the collection, and offered it up as a donation to the museum, which is very much appreciated, as we had been looking for this magazine for a very long time. The magazine is on permanent display in the museum's collection, and is dedciated to the memory of Wesley White. The museum offers its sincere thanks to Susan and Dave for their thoughfulness and kindness in donating this artifact of calculator history to the museum.

Michael Cochran
Mr. Cochran is a luminary in the calculator industry, first working for Cintra on the development of the 909 calculator, then for Tektronix after Tek purchased Cintra. After Tektronix, Mr. Cochran went to Texas Instruments, where he proceded to become TI's chief calculator architect, who was responsible for developing the architecture for many of TI's advanced calculators, as well as TI's first calculator-on-a-chip. The curator would like to thank Mr. Cochran for donation of his TI SR-60A calculator, along with some (very hard to find) magnetic cards for the machine. The calculator is in like-new condition, and works beautifully. Mr. Cochran is the patent holder for the design of the SR-60/SR-60A machines, as well as holding countless other calculator-related patents assigned to Texas Instruments.

Matthew Currie
The Old Calculator Museum owes a debt of gratitude to Mr. Currie for donation of a Commdore AL-1000, serial number 50923 to the museum. This particular machine is a rather early machine with a low serial number, in excellent condition, and fully operational, along with an original dust-cover. This machine provides a basis for comparison with the two other AL-1000's in the museum's collection that reveals interesting production changes and revisions during the early production of the AL-1000.

Harold Koplow [Nov. 21, 1940 - Nov. 4, 2004]
Harold Koplow was Dr. Wang's "right hand technical man" during the chaotic times after Hewlett Packard introduced the HP 9100A, and blew away Wang's seemingly unshakable share of the electronic calculator marketplace. Mr. Koplow's brilliance led to the development of the microcode that made the Wang 700-series (Wang's capable and successful counter to the 9100A/B), and later, Wang's early computer systems, possible. Mr. Koplow has shared many hours of his time through EMail dialog, allowing capture of information that likely would never have been captured if not for his taking the time to share. The Old Calculator Museum has permanently dedicated the exhibit on the Wang 720C to the memory of Mr. Koplow.

Katie Wasserman
Profound thanks are due to Katie Wasserman, a fellow vintage calculator enthusiast, for donation of a beautiful example of a Canon 130S calculator to the Old Calculator Museum. The Canon 130S is a follow-on to Canon's first electronic calculator, the Canon 130. Katie also donated a Victor 14-322 calculator that had some electronic problems to the museum, which will eventually be repaired (if possible), or used for parts to restore a non-operational 14-321 that the museum has on its list of "to do's".

Arnold Allen
The curator would like to thank Mr. Arnold Allen for a large series of donations, both material and monetary that are so very much appreciated. Among the items that Mr. Allen donated were a Wang 360SE Electronics Package, a Wang 370 Programmer, a Wang 371 Punched Card Reader, a stack of Wang Laboratories documentation including Wang 370 operators manuals, and a bunch of Olivetti Programma 101 documentation. Also included were a Tektronix 4051 desktop computer with 4907 8" Floppy Disc drive system, manuals, and tapes; HP 87 Computer/Calculator; HP 85 Computer/Calculator; HP 86B Computer/Calculator; numerous HP-IB mass storage units; lots of HP 85/86/87 documentation; HP 85/86/87 peripheral modules and ROM packs; along with a large assortment of other interesting items. Mr. Arnold graciously donated the items as well as shipping all of the items to the museum. I cannot express how much Mr. Arnold's support of the Old Calculator Museum is appreciated.

Ignacy Fonberg
The Old Calculator Museum would like to offer its thanks to Mr. Ignacy Fonberg for donation of a Wang 701 Output Writer, and a Wang 720C Advanced Programming Calculator. The 701 Output Writer has been restored and is operational. An exhibit on the 701 Output Writer is being prepared. The 720C Calculator suffers from a defective ROM, which prevents it from operating, but it is hoped that it can be repaired in time.

Andrew M. Andrews III
The Old Calculator Museum is honored to thank Mr. Andrew M. Andrews, III, for donation of a box of Monroe 1800-series Mark Sense Program Cards to the museum. These cards, copyrighted in 1974, were used with the Monroe CP-2 card reader (which could read both punched and mark-sense cards) connected to a Monroe 1800-Series programmable calculator to load programs into the calculator's memory.

Carlos Tomaszewski
Carlos Tomaszewski was the architect of the Wyle Labs WS-01/WS-02 Scientific, and when Wyle Labs decided not to pursue further interest in the calculator business, was one of a group of folks that left Wyle Laboratories to form their own calculator company, Computer Design Corporation (later Compucorp). Mr. Tomaszewski was the main architect behind the development of Computer Design Corporation's revolutionary Large Scale Integration (LSI) chipsets (the HTL and ACL chipsets) that blurred the line between calculator and computer, making possible a wide range of high-powered calculators. Carlos has been an invaluable source of information relating to the history and development of Computer Design Corp., and their amazing calculators. For his contributions, the Old Calcualtor Museum is deeply indebted.

Dr. Irwin Wunderman [Apr. 24, 1931 - Jul. 23, 2005]
Dr. Wunderman founded Cintra in late 1967, as a company that developed and marketed digital measurement instrumentation, specifically related to measuring optical energy. Later, a project to develop a calculator that could interface with the instrumentation, to serve as a controller and mathatmatics processor for the instruments. Prior to founding Cintra, Dr. Wunderman was a senior engineer at Hewlett Packard, involved in the early design process of what became HP's first electronic calculator, the HP 9100A. After starting Cintra, Wunderman felt a calculator that could interface to his photometry instrumentation would be a very powerful addition to his company's product line. The calculator was the Cintra 909, followed shortly later by the Cintra 911. Cintra was later sold to Tektronix, which marketed the calculators under the Tektronix name as the Tektronix Model 909 and Model 911 calculators. Dr. Wunderman has contributed copies of many original Cintra advertisements and data sheets, as well as sharing his memories of the company. A deep debt of gratitude is owed to Dr. Wunderman for his contributions.

William Kahn
Mr. Kahn was one of the principles of Mathatronics, and the architect of the design of the Mathatron calculator. The Mathatronics Mathatron has the historical distinction as being the first known commercially-marketed all-electronic programmable desktop calculator. The Mathatron was way ahead of its time, (1964) with algebraic entry, learn-mode programming, automatic square root, and printing of all problems and results on a built-in printer. Mr. Kahn has kindly shared a great deal of information about the formation of Mathatronics, and the design of the early calculators.

Dr. Norman Martin
Dr. Martin is a professor of computer science and philisophy at the University of Texas at Austin. He was the designer of an amazing calculator called the Logicon Computer, developed for in-house engineering use at a company called Logicon, Inc. in the mid-1960's. This machine, while never sold as a commercial product, was quite a feat of engineering brilliance, with a CRT-display, core memory, wire-rope ROM, learn-mode programming, and full math capabilities. This machine gave Logicon engineers fast results to complex math problems that would have required the use of the company's large computer system, saving both time and money. Dr. Martin has shared his memories in a lengthy exchange of EMail. This invaluable capture of information will be the source for an article on the development of this calculator to be posted on the museum in the future. Sincere thanks to Dr. Martin for taking the time to share his memories.

Jim Battle
Jim is a fellow fan of the machines of Wang Laboratories, and has a nice collection of vintage Wang equipment. Jim donated a treasure trove of old Wang 500, 600, and 700-series literature in April of 2010, most of which now are scanned and available on the museum website. Many thanks to Jim for this wonderful material. Jim maintains a fabulous website that documents Wang's very successful entry into the personal computer age, the Wang 2200.

Dennis McNurland
Mr. McNurland worked for Wang Laboratories from 1973 to 1980, mainly working on Wang's 400- and C-Series calculators. He soon became the acknowledged expert in factory repair of these machines, and came to know them inside-out. Dennis kept a great deal of old documentation from his days at Wang, and has generously provided scans and photos from those days which have proven to be wonderful additions to the museum. In addition, Dennis wrote his story about this times at Wang Laboratories, and provided it to the museum for publication. Most recently, Dennis donated parts from a Wang 452 calculator that he came to inherit while working at Wang Labs. This machine, belonging to a Wang staff member, had suffered a motherboard (powersupply) failure, and when Dennis went to look for the replacement part, itwas out of stock. Rather than wait, he just got a new motherboard for the machine (which was in stock), and quickly got his co-worker back up and running. Over time, various parts were accumulated to make an operational 452 using the old motherboard, but was a project that was never completed. Sincere thanks to Mr. McNurland for his donations and support for the Old Calculator Museum.

Dick Ahrens
Mr. Ahrens, a former Friden employee who, as an Electronics Engineer, was involved in the development of the Friden 130 and follow-on electronic calculators. Mr. Ahrens has been an invaluable source of information about the early electronic calculator days at Friden. He has provided the museum with a great deal of material, ranging from a fascinating account of his time at Friden during the development of the 130, to an early prototype production circuit board (a major stretch in the state of the art of circuit board design at the time), and an original photograph of the first operational production prototype of the Friden 130. The information and materials that Dick has provided have greatly enhanced the information available on the development of this revolutionary machine.

Gene McGough
Gene provided a wonderful cache of materials from Wang Laboratories, related to the Wang 300-series and some information on Wang 700-series. Included in the materials donated by Gene are a very comprehensive set of "Wang Laboratories Programmer" periodicals, a Wang 700 Interim Instruction Manual, a number of program library documents for the Wang 300-series calculators, a Wang 370 Programming Guide, a Core Memory board for a Wang 300-series, a keyboard circuit board for a 300-series keyboard/display unit, service invoices for a Wang 360E calculator, various Wang punched cards, an IBM Port-O-Punch, and other Wang information. Gene also provided some very uncommon punched cards for the Wyle Laboratories WS-01/WS-02 Scientific calculator. The Old Calculator Museum deeply appreciates Gene's generosity.

Janet Harrison
Janet and other members of her family donated a number of wonderful instruments to the museum, including a Monroe 1665, a Wang 720, and a Wang 711 I/O writer. All of these devices belonged to her father, Thomas (1914-1996), who was a mechanical engineering consultant, who used these machines in his business. Janet and other members of her family decided to donate these machines to the museum after her father passed away and the machines were gathering dust. Sincere thanks for these amazing artifacts.

Dr. Michael R. Williams
Dr. Williams, a Professor of Computer Science at The University of Calgary, in Calgary, Alberta, Canada, thoughtfully provided a number of original Olivetti Programma 101 Program Coding forms, Magnetic Cards and Mag. Card Storage Jackets for inclusion in the museum.

David Monroe
David kindly provided access to a collection of old Wang Laboratories' Programmer magazines which were a great source of information about Wang's 300 and 700-series calculators.

Joe Rigdon
Joe has been a great source of inspiration and feedback for my museum. He's provided technical information on a number of machines, as well as donating a rare cable to connect the museum's HP 9830A calculator to the HP 9866 thermal printer.

Donald Dupre
Don has been extremely generous in his contributions to the museum, including donation of the electronics package for an early Monroe EPIC-2000 calculator, as well as making a rare early Canon 161 available to the museum. Don's enthusiastic support of the museum is greatly appreciated.

Frank Trantanella
Frank was one of the early employees of Wang Laboratories who was involved in the development of Wang's early electronic calculators. Frank's main involvement was design of custom systems using Wang calculators (Specifically the LOCI-2). Frank has been extremely generous in sharing his insights and experiences with me so I can document them and make them available here in the museum. Frank has also been invaluable in putting the museum in touch with other folks that worked at Wang during the mid to late 1960's.

Gary Laroff
Gary was heavily involved in calculator technology since his graduate school days in the late 1960's, where he became a successful programmer for the HP 9100, and later 9800-series calculators. Gary wrote the statistical program library for HP's 9100 and 9810 calculators, as well as developing a number of other custom programs for HP. Later, Gary went to work for Tektronix, and was heavily involved with the marketing of Tek's Model 21 and Model 31 calculators. Gary also recently donated his personal collection of HP and Tektronix calculators and materials which is greatly appreciated.

Prentice Robinson
Prentice has been another invaluable source of information on the early days of Wang calculators. Prentice was the primary designer of the logic of the Wang LOCI-2, and Wang 300-Series calculators. Prentice worked closely with Dr. Wang to translate Dr. Wang's ideas into electronic reality. The various documents and recollections of the early times at Wang Labs that Prentice has provided have been wonderful additions to the knowledge base of information on early Wang electronic calculators presented here.

Alex Knight
Alex is a great friend and fellow collector of electronic calculators. Alex's compendium of information on old calculators has provided a great deal of helpful information to the museum which wouldn't have been possible otherwise. Alex has also provided me a lot of encouagement, proof-reading, guidance, and overall information exchange that has been invaluable in making the museum a reality. Alex maintains a great calculator Web site called "The Electronic Calculator History & Technology E-Museum".

Paxton Hoag
Paxton has turned me on to a number of machines that would have otherwise ended up being scrapped. He's kept on the lookout for the museum, and I really appreciate the help he's given by allowing me to rescue some difficult to find old machines. Included among the machines that Paxton provided direct access to, or provided pointers to were the HP9100A, Wang 700-Series machines, HP 9810, HP 9820, and HP9830, all of which are wonderful additions to the museum.

Mark Glusker
Mark, another fellow collector who specializes in electro-mechanical machines, has been a great source of information and inspiration, as well as a donor of a number of interesting machines that have made their way into the museum.

Jim Willing
Another source of a few wonderful and noteworthy machines in the museum.

Kirk Wennerstrom
Thanks to Kirk for donation of an original copy of the Monroe 1610 Electronic Display Calculator Operatin Instructions.

Dan McDonald
Dan has helped me find a number of great old machines for the museum. Dan collects electro-mechanical calculators, along with classic computers and other interesting technological artifacts.

Doug Coward
Doug has provided the museum with a great deal of supporting information on the Wang 300-series calculators that has proven to be very helpful.

Chuck Carbaugh
Chuck kindly donated some Wang 300-series equipment that he had stored in his basement. This generous donation helped round out the configuration of the Wang 360SE system in the museum, as well as adding an invaluable source of accessories and spare parts which will help maintain the Wang 300-Series machines in the museum.

Serge Devidts
A fellow desktop electronic calculator enthusiast and collector living in Belguim, Serge has been a wonderful source of inspiration for my calculator preservation efforts. He has also been a great source of information and photos which have helped document some of the machines in the Old Calculator Museum. Serge has built a wonderful calculator-related Web site called BE-CALC that you should make a point of visiting.

Mark Paulin
Mark loaned the museum his pristine Sharp Compet 363P calculator for a guest exhibit. The museum has since acquired it's own 363P, but would like to acknowledge Mr. Paulin's gracious loan of his machine for creating the exhibit on the Compet 363P.