A numeric keypad, number pad, numpad, or ten key, is the calculator-style group of ten numeric keys accompanied by other keys, usually on the far right side of computer keyboard. This grouping allows quick number entry with the right hand, without the need to use both hands on number row of main keyboard. On a standard IBM PC keyboard, numpad has 17 keys, including digits 0 to 9, + (addition), - (subtraction), * (multiplication), and / (division) symbols, . (decimal point), Num Lock, and ⌅ Enter keys. On smaller keyboards (such as those found on laptops), the numeric keypad can be implemented as alternative markings on alphabetic keys (usually I-O-P, K-L-;, ,-.-/) or added as a separate unit, that can be connected to a device by means such as USB; some of these may include keys not found on a standard numpad, such as a spacebar or a 00 (or 000) key.
Sometimes it is necessary to distinguish between a key on the numpad and an equivalent key elsewhere on the keyboard. For example, depending on the software in use, pressing the numpad's 0 key may produce different results than pressing the alphanumeric 0 key. In such cases, the numpad-specific key may be indicated as e.g. Numpad 0, NumPad0, Num 0, or likewise to remove ambiguity.
