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26th and last letter of the alphabetalphabet
[Gr. alpha-beta, like Eng. ABC], system of writing, theoretically having a one-for-one relation between character (or letter) and phoneme (see phonetics). Few alphabets have achieved the ideal exactness.
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, representing the voiced correspondent of voiceless s, as in the English zebra. Its original is the Greek zeta, which the Romans borrowed and added to their alphabet.


/zed/ <language, specification> 1. (After Zermelo-Fr?nkel set theory) A specification language developed by the Programming Research Group at Oxford University around 1980. Z is used for describing and modelling computing systems. It is based on axiomatic set theory and first order predicate logic. Z is written using many non-ASCII symbols. It was used in the IBM CICS project.

See also Z++.

["Understanding Z", J.M. Spivey, Cambridge U Press 1988].

2. <language, simulation> A stack-based, complex arithmetic simulation language from ZOLA Technologies.


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.
References in periodicals archive ?
Sew together 2 block V's, 3 block W's and 4 block Z's in order shown to make a row 1.
Comes Around,'' during which Jay Z came out toward the end before the band segued into one of Jay Z's bigger hits (and there are a lot of them), "Dirt Off Your Shoulder.
On Issue 2, the GLAM contemplated whether Z's elective change resulted in a significant modification of the Z liabilities under Regs.
Z's refusal of dialysis could have led to buildup of carbidopa/levodopa in her blood, thereby contributing to mania; however, when she began feeling irritable, she refused several of her medications, including carbidopa/levodopa.
Z's privacy, best interests, and need for protection.
Focusing on "emerging West Coast artists," WPCI commissions will lead to premieres at one of Z's nine co-commissioning partners.
Sinars and his colleagues have now plucked from Z's X-ray deluge a grainy record of those wires' fates.
Over time, people who don't get enough Z's have up to an 80 percent greater chance of developing heart disease than those who get eight hours of sleep.
Anna, who is terminally ill, has arrived at her lesbian lover Z's cottage intent on making this night her last.
In running the Trey Naked out of stack, we switch X's and Z's responsibilities.
I've heard of sound sleepers, but this guy takes his Z's in a coma.
Another thing: the GAO says that there's still plenty of fat to trim from the USDA and HEW, but as far as I can see Congress is just catching a few Z's.