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  2. History of tablet computers - Wikipedia

    en.wikipedia.org/wiki/History_of_tablet_computers

    It features a 12.9-inch display. It also released accessories at the same time such as its first tablet point device, the Apple Pencil. 2016 Apple released the iPad Pro in a 9.7-inch display that had a 256 GB option, the largest amount of storage available on a consumer tablet. [133] 2017 Apple released the iPad, its lowest cost 9.7-inch tablet ...

  3. Dots per inch - Wikipedia

    en.wikipedia.org/wiki/Dots_per_inch

    A close-up of the dots produced by an inkjet printer at draft quality. Actual size is approximately 1 ⁄ 4 by 1 ⁄ 4 inch (6 by 6 mm). Individual coloured droplets of ink are visible; this sample is about 150 DPI.

  4. Sharp Corporation - Wikipedia

    en.wikipedia.org/wiki/Sharp_Corporation

    This was the first pocketable calculator priced at less than JP¥100,000 (less than US$300), and turned out to be a popular item. [11] Also in the same era the company introduced the first microwave oven with a turntable between 1964 and 1966. The company was renamed Sharp Corporation in 1970. Sharp produced the first LCD calculator

  5. 68–95–99.7 rule - Wikipedia

    en.wikipedia.org/wiki/68–95–99.7_rule

    In statistics, the 68–95–99.7 rule, also known as the empirical rule, and sometimes abbreviated 3sr, is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: approximately 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations of the mean, respectively.

  6. Save percentage - Wikipedia

    en.wikipedia.org/wiki/Save_percentage

    Although the statistic is a percentage, it is often given as a decimal in North America, in the same way as a batting average in baseball. Thus, .933 means a goaltender saved 93.3 percent of all shots they faced. In international ice hockey, such as the IIHF World Championships, a save percentage is expressed as a true percentage, such as 90.5% ...

  7. Body mass index - Wikipedia

    en.wikipedia.org/wiki/Body_mass_index

    Body mass index (BMI) is a value derived from the mass and height of a person. The BMI is defined as the body mass divided by the square of the body height, and is expressed in units of kg/m 2, resulting from mass in kilograms (kg) and height in metres (m).

  8. Scientific calculator - Wikipedia

    en.wikipedia.org/wiki/Scientific_calculator

    Casio fx-77, a solar-powered digital calculator from the 1980s using a single-line LCD. A scientific calculator is an electronic calculator, either desktop or handheld, designed to perform calculations using basic (addition, subtraction, multiplication, division) and advanced (trigonometric, hyperbolic, etc.) mathematical operations and functions.

  9. Circular mil - Wikipedia

    en.wikipedia.org/wiki/Circular_mil

    As a unit of area, the circular mil can be converted to other units such as square inches or square millimetres. 1 circular mil is approximately equal to: 0.7854 square mils (1 square mil is about 1.273 circular mils) 7.854 × 10 −7 square inches (1 square inch is about 1.273 million circular mils) 5.067 × 10 −10 square metres