View inside of the laboratory for examination of magnetic heads at Wolfgang Bogen GmbH in Berlin - 1968
Did you know there is a Theorem called "The Sheldon Cooper's Theorem"
During episode 73 of the series, Sheldon explains his theory about the best number: 73. Why? Why? Because it is the twenty-first prime number, inverting its numbers we get 37 (the prime number 12) and inverting it again we get 21 (the product of numbers 7 and 3). Unbelievable isn't it?
Experts in number theory, like Pomerance from the University of Dartmouth, were inspired by this episode to dig deeper. After extensive investigation, they concluded that 73 is the only prime number that meets these characteristics, at least so far.
Demonstrator and computer trainer Andrina Wood at the console of the £60,000 vacuum tube based machine called the BTM 1202 HEC "Hollerith Electronic Computer" manufactured by ICT (International Computers & Tabulators Ltd) formerly the British Tabulating Machine Co., Business Efficiency Fair September 5, 1958. The 1202 used the BTM Rolling Total Tabulator and associated summary punch for its peripherals (Card reader, punch, printer). The physical componentry of the HEC machine (as opposed to the internal logic) was cobbled together from technology first developed for the BTM 542 and 550 calculators and eventually the 555 computer. The programs for the work being demonstrated were written entirely by Miss Wood before her departure around the world on a BTM promo tour, an early electronic computer expert supervising training of local staff. Computers in the 1950s where far from user friendly, and because of this, computer operators were usually programmers as well.
https://en.wikipedia.org/wiki/Hollerith_Electronic_Computer
