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,[lower-alpha 1] pressing the numpad's 0 key may produce different results than pressing the alphanumeric 0 key.[lower-alpha 2] In such cases, the numpad-specific key may be indicated as e.g. Numpad 0, NumPad0 [lower-alpha 3], Num 0, or likewise to remove ambiguity.