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A numeric keypad, numpad or ten key, is the small, palm-sized, seventeen key section of a computer keyboard, usually on the very far right. The numeric keypad features digits 0 to 9, addition (+), subtraction (-), multiplication (*) and division (/) symbols, a decimal point (.) and Num Lock and Enter keys. Laptop keyboards often do not have a numpad, but may provide numpad input by holding a modifier key (typically labelled "Fn") and operating keys on the standard keyboard. Particularly large laptops (typically those with a 17 inch screen or larger) may have space for a real numpad, and many companies sell separate numpads which connect to the host laptop by a USB connection (many of these also add an additional spacebar off to the side of the number zero where the thumb is located, as well as an additional 00 key typical of modern adding machines and cash registers). It also provides a calculator-style keyboard for efficient entering of numbers.
Numeric keypads usually operate in two modes: when Num Lock is off, keys 8, 6, 2, 4 act like arrow keys and 7, 9, 3, 1 act like Home, PgUp, PgDn and End; when Num Lock is on, digits keys produce corresponding digits. On Apple Macintosh computers, which lack a Num Lock key, the numeric keypad always produces only numbers. The Num Lock key is replaced by the Clear key.
The arrangement of digits on numeric keypads with the 7-8-9 keys on top and 1-2-3 keys on the third row is derived from calculators and cash registers. This is notably different from that of telephone Touch-Tone keypads which have the 1-2-3 keys on top and 7-8-9 keys on the third row. Some think that the layout for the early american telephone keypads was arranged this way so that the addition of the alphabetical characters followed the digits numerically. Some people experience the difference in layout as a confusing annoyance.
Numeric keypads are useful for entering long sequences of numbers quickly, for example in spreadsheets, financial/accounting programs, and calculators. Input in this style is similar to that of a calculator or adding machine.
Ten key speed is measured in Keystrokes per Hour (KPH). The minimum required speed for many data entry jobs is around 9000 KPH with good accuracy. A speed of 12,000 is considered excellent.
Chinese input methods
Numeric keypads are also used for playing some computer games where the player must control a character, for example roguelikes. Unlike arrow keys, the numeric keypad allows diagonal movement. For keyboards without a numeric keypad, some games provide alternative movement keys, such as classic Rogue's HJKL keys.
The numeric keypad can also be an alternative to the WASD keys for navigation in computer gaming. This can be an attractive option for left-handed people who prefer to use the mouse with their left hand.
- "What Is a Ten Key? (with pictures)". WiseGeek. Retrieved 8 January 2014.
- Pasewark, William Robert; Knowlton, Todd (1995-01-01). Ten-Key Skill Builder for Computers. South-Western Educational Pub. ISBN 9780538629195.
- Stroman, James; Wilson, Kevin; Wauson, Jennifer (2011-09-01). Administrative Assistant's and Secretary's Handbook. AMACOM Div American Mgmt Assn. p. 224. ISBN 9780814417607.
- numeric keypad at FOLDOC
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