Zetta sextillion (10 21 ), or 1,000,000,000,000,000,000,000. See ZB.
In mathematics, the third of a set of unknown variables, with x and y being the first two unknowns. See also x, y, and z-axis.
One of the two letters, along with Q, that traditionally did not appear on a telephone dial or keypad.The thought was that Z could be confused with 2 and that Q could be confused with O. Z now appears with W, X, and Y on number 9. Alphanumeric dialing was, and remains, a North American practice. Telephones in most other countries do not sport letters.
See Z in Computer
A mathematical language used for developing the functional specification of a software program. Developed in the late 1970s at Oxford University, IBM's CICS software is specified in Z.