Haha

• What is the maximum number of digits that the type-1 calculator can display?


  Eight digits
• How many digits can the type-2 calculator display?


  Fifteen digits
• How does the digit display of the iPhone 6 Plus compare to the type-1 calculator?


  The iPhone 6 Plus displays 16 digits in scientific mode, which is more than the type-1 calculator.
• What role did mechanical calculators play in the 20th century office life?


  Mechanical calculators dominated office life until the late 1960s.
• When did electronics begin to take over from mechanical calculators?


  In the late 1960s
• When did the story of the electronic calculator begin?


  In the late 1930s
• What was the first all-electronic computer developed during the Second World War?

  Colossus
• What type of algorithms did Colossus perform?


  Exclusive or (XOR) Boolean algorithms
• When was the ENIAC constructed?


  In 1946
• What was the primary function of the ENIAC?


  It served as a digital artillery firing table calculator and could solve a large class of numerical problems.
• How much faster was the ENIAC compared to electro-mechanical computers?


  1,000 times faster
• What components were required for the ENIAC to function?


  It required 17,468 vacuum tubes, 7,200 crystal diodes, 1,500 relays, 70,000 resistors, 10,000 capacitors, and around 5 million hand-soldered joints.
• What was the weight of the ENIAC?


  About 27 tonnes
• How much floor space did the ENIAC occupy?


  It took up 1800 square feet of floorspace.
• What was the power consumption of the ENIAC comparable to?


  It consumed as much power as a small town.
• What technological advancements were necessary for electronic calculating to develop for the office?

  Miniaturization of valves and the development of solid-state transistors.
• What was the world's first all-electronic desktop calculator?

  ANITA
• Who developed the ANITA calculator?


  Control Systems Ltd. in Britain
• What type of display did ANITA use?


  It used 'Nixie' glow discharge tubes for its illuminated 12-place display.
• How much did the ANITA calculators sell for around 1964?


  About £355 ($1,000)
• What was the significance of the ANITA calculators in the market?


  They were the only electronic desktop calculators available at the time.
• What were the names of the three new transistorized competitors that appeared in 1964?


  The American Friden 130 series, the Italian IME 84rc, and the Sharp Compet CS10A.
• What was the first electronic calculator to feature a CRT display?


  The Friden EC-130
• What was unique about the Toshiba "Toscal" BC-1411 calculator?


  It used an early form of Random Access Memory (RAM) built from separate circuit boards.
• What was the significance of the Olivetti Programma 101?


  It was programmable by non-specialists and could read and write to magnetic cards.
• What was the first calculator in the world to include a square root function?


  ELKA 22
• What was the weight of the ELKA 22 calculator?


  About 8 kg
• What was the Texas Instruments "Cal Tech" prototype capable of doing?


  It could add, multiply, subtract, and divide, and print results to a paper tape.
• How long did it take to move from the abacus to the first mechanical calculators?


  3,700 years
• How long did it take for mechanics to give way to electronics?

  250 years
• What was the significance of the Texas Instruments 'Cal-Tech' prototype?


  It was compact enough to be held in the hand.
• What advancement allowed calculators to drastically reduce in size and power consumption by 1969?


  The use of low power consumption chips.
• What was the first handheld calculator released from Japan?

  Sharp's QT-8D Micro Compet
• What was the significance of the Busicom LE-120 pocket calculator?


  It was the first 'calculator on a chip' combining all functions on one chip.
• What was the price of the Bowmar 901B calculator in 1971?


  About $200
• What was the main problem with the early pocket calculators?


  They were too expensive for most consumers and had limited functions.
• What was the first low-cost calculator produced by Sinclair?


  The Cambridge calculator
• What was the price of the Sinclair Cambridge calculator?


  £29.95
• What was the HP-35 calculator known for?


  It was a pocket-sized calculator with trigonometric and algebraic functions.
• What was the significance of the HP-65 calculator?


  It had a capacity of 100 instructions and could store and retrieve programs.