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HP 9815A. Chronologically, the models of the family were: HP 9810A, a keystroke programmable computer with magnetic cards and LED display, introduced in 1971, [1]; HP 9820A, introduced in 1972, was the first HP model that deals with algebraic input (not only RPN) [2] featured a high level language simpler than BASIC that was later named high performance language (HPL),
The earliest computer-related usage for a stylus was in 1643 with Pascal's calculator. [4] The device had rotary dials that rotated in accordance with the selected numbers; with gears, drums, and clever engineering, it was capable of addition, subtraction, multiplication and division (using 9's constant). A stylus was used to turn the dials.
While the keyboards of the Nspire Touchpad and the Nspire CAS Touchpad are both removable (to access the AAA batteries), only the Nspire Touchpad is compatible with the TI-84 Plus Keypad that invokes the TI-84 Plus emulator. The Nspire CAS Touchpad keyboard has a slightly rounded top which makes it incompatible with the emulator keypad.
The Dvorak keyboard is designed so that the middle row of keys includes the most common letters, with the goal of allowing greater efficiency and comfort while typing. These keyboards usually contains letters, numbers, currency sign(s), punctuation, function and control keys, arrow keys, a keypad, and may include a wristpad.
For use with a shorter keyboard or laptop which omits the numberpad Bluetooth numeric keypad, working also as calculator. A numeric keypad, number pad, numpad, or ten key, [1] [2] [3] is the palm-sized, usually-17-key section of a standard computer keyboard, usually on the far right. It provides calculator-style efficiency for entering numbers.
Pen computing refers to any computer user-interface using a pen or stylus and tablet, over input devices such as a keyboard or a mouse.. Historically, pen computing (defined as a computer system employing a user-interface using a pointing device plus handwriting recognition as the primary means for interactive user input) predates the use of a mouse and graphical display by at least two ...
When off, the keypad acts as arrow and navigational keys. When on, it is a 10-key number pad similar to a standard calculator. Preferences vary so much that a favorite default for this key can often be configured in the BIOS. The key continues to exist on keyboards with separate arrow keys to accommodate those who still prefer the toggleable ...
The calculator had a special user mode where the user could assign any function to any key if the default assignments provided by HP were not suited to a specific application. For this mode, the HP-41C came with blank keyboard templates; i.e. plastic covers with holes for the keys, so the user could annotate customized keys.
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