In the 1960’s, Paul Klipsch was found in his office, stripped down to his skivvies with the thermostat set to high. He was trying to determine why early calculators would quit when operated at high temperatures. He later sent a letter to the manufacturer, explaining the source of the problem. madmikesamerica.com/2010/…
In the original StarWars movie, the prop for Luke's Lightsaber was made from a Graflex Flashgun, sliding glass cabinet grips and calculator parts. Kenobi's Lightsaber was put together with a sink knob, a browning machine gun booster, a WWI rifle grenade and a part from a Rolls-Royce jet engine. nofilmschool.com/Original…
Leibniz built the first calculator in 1694, it could add, subtract, multiply and divide numbers up to 16 digits. en.wikipedia.org/wiki/Ste…
Though Casio (1985) and Sharp (1986) were the first to market graphing calculators, it wasn’t until 1990, when Texas Instruments released the TI-81, that they began to hit the mainstream. At the time, most students were fine with drawing graphs on paper and educators were wary of change thehustle.co/graphing-cal…
A dog’s age is not 7 times human age, but: 16(ln(dog’s age))+31. It’s a natural logarithmic curve, so a 1-year old dog is about 31 in human years, and a 10-year old is about 68. (Link has calculator!) smithsonianmag.com/smart-…
Steve Wozniak, co-founder of Apple Inc sold his HP scientific calculator while Steve Jobs sold his Volkswagen van to raise the money they needed to build the first batch of circuit boards for Apple-1 computers. They got $500 (About $2.3k today) and $1,500 (About $6.9k today) each. en.wikipedia.org/wiki/Ste…
A programmable HP-65 calculator was used as a backup in the Apollo-Soyuz Test Project, in case the main system malfunctioned. airandspace.si.edu/collec…
Today I learned of the Casio VL-1, which combines a keyboard, a synthesiser, and a calculator. Despite its cheap and unorthodox construction, it became popular among musicians across many genres, from the German band Trio in their 1982 song "Da da da" to C418 in the Minecraft OST. en.wikipedia.org/wiki/Cas…
The iPad doesn't have a native calculator app because Steve Jobs didn't like any of the proposed UI designs cultofmac.com/421893/why-…
The first two toys to use electronic sound chips to make noise rather than an analogue recordings, Simon and the Speak & Spell, both got their hardware from graphic calculator maker Texas Instruments 20k.org/episodes/noiserus
The first pocket calculator [Curta (Type I) mechanical calculator] was invented by the Jewish inventor Curt Herzstark in Buchenwald concentration camp during WWII. The Nazis planned to make a present of it to Hitler as a gift after the successful end of the war. en.wikipedia.org/wiki/Cur…
The Bank of England has an inflation calculator that dates back to 1209. The calculations are approximate and give a rough guide to the buying power of the pound for goods and services purchased in the UK. For example, Β£1 in 1209 = Β£2k in 2018 and Β£1 in 1577 = Β£389 in 2018. bankofengland.co.uk/monet…
A programmer at Apple kept working for three months after his project was canceled, simply because he thought the work was interesting and wanted to finish. Apple employees helped his cause by sneaking him into the building, and the project (a graphing calculator) was successfully released. mentalfloss.com/article/3…
Today I learned of the Sharp EL-8061 - essentially a pocket-watch/calculator hybrid calcuseum.com/SCRAPBOOK/B…
There is an Office Machines Museum in Tehran. The collection houses more than 80 unique and early devices such as typewriters, check writers, pencil sharpeners, duplicators, calculators, cash registers, telegraph equipment, telephones, etc. en.wikipedia.org/wiki/Saf…
Texas Instruments invented the silicone transistor, the semiconductor, transistor radio, and TTL chips. They’re also 192nd on the Fortune 500 list, with a worth of $100 billion, and only 3% of their annual revenue comes from the calculators we always associate with them. wikipedia.org/wiki/Texas_…
Today I learned about the Curta, the smallest mass-produced pocket calculator which was still in use up to the 1970s. Its inventor developed the working drawings imprisoned in the Buchenwald concentration camp. en.wikipedia.org/wiki/Cur…
The reason keypads on phones and calculators/keyboards are opposite is because the telephone designers figured that if they reversed the layout, the dialing speeds would decrease and the tone-recognition would be able to do its job more reliably. electronics.howstuffworks…
The TI-84/83 calculators have comparably higher profit margins than apple due to their monopoly on the school system washingtonpost.com/news/i…
When Kim Peek managed payrolls of 160 people, he was able to complete this task in just hours without a calculator and when he was fired to be replaced by computer, it took two full time accountants plus the computer just to replace him. en.wikipedia.org/wiki/Kim…
A reliable, non-defective calculator can randomly make an isolated mistake called a soft error (e.g. returning 2+2=5). The odds of seeing one are astronomically low, and, interestingly, cosmic rays are a main source of the problem. ti.com/support-quality/fa…
In 1986, calculators still represented an estimated 41% of the world's general-purpose hardware capacity to compute information. By 2007, this had diminished to less than 0.05%. science.sciencemag.org/co…
A lady from Florida decided to marry Tetris as her husband, after her failed relationship with a calculator ladbible.com/community/we…
That, Charles Babbage designed two new kinds of mechanical calculators, which were so big that they required the power of a steam engine to operate, and that were too sophisticated to be built in his lifetime. en.wikipedia.org/wiki/Mec…
When Kim Peek managed payrolls of 160 people, he was able to complete this task in just hours without a calculator and when he was fired to be replaced by computer, it took two full time accountants plus the computer just to replace him. en.wikipedia.org/wiki/Kim…
The pocket calculator, patented in 1967, was one of the earliest uses of rechargable batteries. One of the creators, Jerry Merryman, saw it not just as a pocket calculator, but as an "electionic revolution," bringing buttons, thermal printing, and rechargable batteries to the forefront. npr.org/2013/04/15/177369…
89-year-old woman catalogued all the mail she gets from nonprofit fund-raisers. One year, she got 868 solicitations. Charities scrounging for donations send promotional notepads, calculators, magnifying glasses and other stuff. She collects it and gives it away -- to charity, of course. marketplace.org/2010/12/3…
There is a special BMI calculator to account for limb loss in amputees amputee-coalition.org/lim…
The TI-83 Plus Calculator could run Doom and Tetris youtu.be/nduMTX86Zl0?t=45…
In 1977, the "Human Calculator" Shakuntala Devi found the 23rd root of a 201-digit number in 50 seconds. en.wikipedia.org/wiki/Sha…
In 2006, Scientific American published an issue that included blueprints on how to make a do it yourself paper Slide Rule calculator public.beuth-hochschule.d…
Jules Verne wrote the novel "Paris in the Twentieth Century" back in 1863 and described a world of glass skyscrapers, high-speed trains, gas-powered automobiles, calculators, and a worldwide communications network. en.wikipedia.org/wiki/Jul…
The first "smartphone" was invented in 1992 by IBM and was called IBM Simon code-named "Angler". It has many features such as address book, calculator, calendar, fax and many more. en.wikipedia.org/wiki/IBM…
Isaac Newton lost over Β£20,000 from the South Sea Bubble, one of the earliest documented asset bubbles in history. Using a set of inflation calculators, the equivalent value is $4,108,793.48 in 2018 dollars. en.wikipedia.org/wiki/Isa…
The Sunway Taihulight supercomputer can calculate in 1 minute what 7 billion people using calculators can calculate in 32 years. youtube.com/watch?v=KEdsr…
There is no definitive reason as to why the keypads for calculators and phones are opposite. electronics.howstuffworks…
The new Texas Instrument calculators have ABC keyboards because if they had QWERTY keyboards, they would be considered computers and wouldn't be allowed for standardized test taking en.m.wikipedia.org/wiki/V…
In South Korea babies are considered 1 year old from the day they were born and then get 1 year older on New Year's Day. There are calculators to convert international age into Korean age and vice versa. waegukin.com/korean-age-c…
In 1999 Professor Bill Ditto made a simple calculator using the neurons taken out of leeches; word's first biological computer. It was aptly named the "leech-ulator". news.bbc.co.uk/2/hi/sci/t…
1974. After the first pocket scientific calculator (Hp 35), that had taken two years, 20 engineers, and a million dollars; Sinclair did a similar job with one programmer and a memory of 320 instructions. files.righto.com/calculat…
Someone used Super Mario Maker to build a level that is a functional calculator, though it can only add two digits between zero and 7 and takes about two minutes to generate an answer. hackaday.com/2016/02/10/c…
A potential reason that calculator keys and touch-tone phone keys differ in layout is because the hardware of 1950s phones could not keep up with the speed at which professionals would dial them so a new layout had to be introduced to slow them down. electronics.howstuffworks…
A desktop calculator in 1966 cost over $1000... that's about $7500 today, adjusted for inflation. Even after they were on the market for years in the early 70's they were still around $200, or what would be $1500 today. vintagecalculators.com/ht…
The calculator number limit of 10^99 is actually pretty large. There are only 10^80 atoms in the observable universe. en.wikipedia.org/wiki/Obs…
Mathematician William Shanks' lifetime of work led to the determination of the value of Pi to 707 decimal places in the year 1873. 75 years later, calculations on a desk calculator revealed that the last 180 decimal places were incorrect. mathlair.allfunandgames.c…
NASA put a man on the moon with a computer that had 1/6th the computing power of today's TI-83 calculator. kscvisit.com/apollo-agc.h…
When the first scientific calculator, the HP-35 came out in 1971 it cost $395 or $2,248 in today's dollars. en.wikipedia.org/wiki/HP-…
There were amazing portable calculators in 1930 called Curta en.wikipedia.org/wiki/Cur…
The TI-92 graphing calculator from 1992-1995 had a QWERTY keyboard. Because of this keyboard, it was given the status of a "computer" rather than "calculator" by testing facilities and cannot be used on many exams like SAT and AP en.wikipedia.org/wiki/TI-…
Two Sports Science Students, in a University Controlled Study, Where Accidentally Given 30 Grams of Caffeine Instead of 0.3 Grams, Due to a Misplaced Decimal Point on a Cell Phone Calculator bbc.com/news/uk-england-t…

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