Invented by Jack Kilby in 1967, the hand-held calculator is a device for performing mathematical calculations, distinguished from a computer by having a limited problem solving ability and an interface optimized for interactive calculation rather than programming. Calculators can be hardware or software, and mechanical or electronic, and are often built into devices such as PDAs or mobile phones.
A laser printer is a common type of computer printer that rapidly produces high quality text and graphics on plain paper. The laser printer was invented at Xerox in 1969 by researcher Gary Starkweather, who had an improved printer working by 1971 and incorporated into a fully functional networked printer system by about a year later.
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A child safety seat, sometimes referred to as an infant safety seat, a child restraint system, a restraint car seat, or ambiguously as car seats, are seats designed specifically to protect children from injury or death during collisions. They are commonly used by children when riding in a vehicle. In 1960, Leonard Rivkin of Denver, Colorado invented the first child safe car seat for use in vehicles equipped with bucket seats. A patent was filed on March 5, 1962 and was issued on October 22, 1963.
A magnetic stripe card is a type of card capable of storing data by modifying the magnetism of tiny iron-based magnetic particles on a band of magnetic material on the card. The magnetic stripe, sometimes called a magstripe, is read by physical contact and swiping past a reading head. Magnetic stripe cards are commonly used in credit cards, identity cards such as a driver's license, and transportation tickets. The magnetic stripe card was invented in 1960 by IBM engineer Forrest Parry, who conceived the idea of incorporating a piece of magnetic tape in order to store secured information and data to a plastic card base