Y


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Y

Y, 25th letter of the alphabet. It was a Latin importation of the eastern Greek upsilon (see U), which was pronounced like ü; the Romans used it for Greek words. In English y mainly represents the semivowel occurring in words such as yet; the same semivowel is the second member of the diphthongs ā, ē, ī, and oi. The modern ignorant use of y in ye for the (as in “Ye Olde Shoppe”) is based on a misreading of an old sign for th. In chemistry Y is the symbol for the element yttrium.
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Y

(electricity)
wye
(chemistry)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Y

(1)
General purpose language syntactically like RATFOR, semantically like C. Lacks structures and pointers. Used as a source language for Jack W. Davidson and Christopher W. Fraser's peephole optimiser which inspired GCC RTL and other optimisation ideas.

ftp://ftp.cs.princeton.edu/pub/y+po.tar.Z. It is a copy of the original distribution from the University of Arizona during the early 80's, totally unsupported.

["The Y Programming Language", D.R. Hanson, SIGPLAN Notices 16(2):59-68 (Feb 1981)].

[Jack W. Davidson and Christopher W. Fraser, "The Design and Application of a Retargetable Peephole Optimiser", TOPLAS, Apr. 1980].

[Jack W. Davidson, "Simplifying Code Through Peephole Optimisation" Technical Report TR81-19, The University of Arizona, Tucson, AZ, 1981].

[Jack W. Davidson and Christopher W. Fraser, "Register Allocation and Exhaustive Peephole Optimisation" Software-Practice and Experience, Sep. 1984].

Y

(2)
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

Y

(1) The brightness signal (luma) in the YUV color space. See YUV.

(2) An abbreviation of Yes, commonly used in conjunction with N for No; for example, a prompt may ask you: Do you want to overwrite the file: y/n?

(3) The symbol typically used for output of a combinational logic circuit. See combinational logic.
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