9/26/2023 0 Comments Regular keypad with letters![]() Karlin, an industrial psychologist at Bell Labs in Murray Hill, NJ. The invention of the push-button telephone keypad is attributed to John E. There is no standard for the layout of the four arithmetic operations, the decimal point, equal sign or other more advanced mathematical functions on the keypad of a calculator. The modern four-row arrangement debuted with the Sundstrand Adding Machine in 1911. The calculator had the digit keys arranged in one row, with zero on the left, and 9 on the right. A smaller, 10-key input first started on the Standard Adding Machine in 1901. The first key-activated mechanical calculators and many cash registers used "parallel" keys with one column of 0 to 9 for each position the machine could use. ![]() In 1984, the first projected capacitance keypad was used to sense through the shop window of a travel agency (see image). Keypads for the entry of PINs and for product selection appear on many devices including ATMs, vending machines, point of sale payment devices, time clocks, combination locks and digital door locks. Separate external plug-in keypads can be purchased. Many laptop computers have special function keys that turn part of the alphabetical keyboard into a numerical keypad as there is insufficient space to allow a separate keypad to be built into the laptop's chassis. This number pad (commonly abbreviated to numpad) is usually positioned on the right side of the keyboard because most people are right-handed. Many devices follow the E.161 standard for their arrangement.Ī computer keyboard usually has a small numeric keypad on the side, in addition to the other number keys on the top, but with a calculator-style arrangement of buttons that allow more efficient entry of numerical data. Keypads are found on devices which require mainly numeric input such as calculators, television remotes, push-button telephones, vending machines, ATMs, point of sale terminals, combination locks, safes, and digital door locks. ![]() Pads mostly containing numbers and used with computers are numeric keypads. Numeric keypad, integrated with a computer keyboard A calculator 1984 Flier for Projected Capacitance keypadĪ keypad is a block or pad of buttons set with an arrangement of digits, symbols, or alphabetical letters. Quote, quotation mark, or inverted commas.Input device A telephone keypad using the ITU E.161 standard. Open brace, squiggly brackets, or curly bracket.Ĭlose brace, squiggly brackets, or curly bracket.įorward slash, solidus, virgule, whack, and mathematical division symbol. Octothorpe, number, pound, sharp, or hash.Īsterisk, mathematical multiplication symbol, and sometimes called a star. Information about the F13 through F24 keyboard keys.Īlternate key (PC only Mac users have an Option key).Īcute, back quote, grave, grave accent, left quote, open quote, or a push.Įxclamation mark, exclamation point, or arobase, asperand, at, or at symbol. PC keyboards also have a Menu key that looks like a cursor pointing to a menu. PC keyboards have a Windows key that looks like a four-pane, wavy window.Īpple Mac computers have a Command with a symbol resembling a cloverleaf. Listing of non-alphanumeric keys Key/symbol Clicking any of the keys opens a new page with full details. You can hover your mouse cursor over any key to see a description. Example of a keyboardīelow is a close-up image of a QWERTY computer keyboard with each of the keys selectable. For information on keyboard shortcut key combinations (e.g., Ctrl+ S or Alt+ F4), see our computer keyboard shortcut keys page.
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