postscript

[pohst-skript, pohs-]
noun
1.
a paragraph, phrase, etc., added to a letter that has already been concluded and signed by the writer.
2.
any addition or supplement, as one appended by a writer to a book to supply further information.

Origin:
1515–25; < Latin postscrīptum, neuter past participle of postscrībere to write after

subpostscript, noun
Dictionary.com Unabridged

PostScript

[pohst-skript, pohs]
Trademark.
a page description language using scalable fonts that can be printed on a variety of appropriately equipped devices, including laser printers and professional-quality imagesetters.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
postscript (ˈpəʊsˌskrɪpt, ˈpəʊst-)
 
n
1.  a message added at the end of a letter, after the signature
2.  any supplement, as to a document or book
 
[C16: from Late Latin postscribere to write after, from post- + scribere to write]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

postscript
1523, from L. post scriptum "written after," from neuter pp. of L. postscribere "write after," from post "after" + scribere "to write" (see script).
Online Etymology Dictionary, © 2010 Douglas Harper
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FOLDOC
Computing Dictionary

PostScript definition

language, text, graphics
A page description language based on work originally done by John Gaffney at Evans and Sutherland in 1976, evolving through "JaM" ("John and Martin", Martin Newell) at XEROX PARC, and finally implemented in its current form by John Warnock et al. after he and Chuck Geschke founded Adobe Systems, Inc. in 1982.
PostScript is an interpreted, stack-based language (like FORTH). It was used as a page description language by the Apple LaserWriter, and now many laser printers and on-screen graphics systems. Its primary application is to describe the appearance of text, graphical shapes, and sampled images on printed or displayed pages.
A program in PostScript can communicate a document description from a composition system to a printing system in a device-independent way.
PostScript is an unusually powerful printer language because it is a full programming language, rather than a series of low-level escape sequences. (In this it parallels Emacs, which exploited a similar insight about editing tasks). It is also noteworthy for implementing on-the fly rasterisation, from Bezier curve descriptions, of high-quality fonts at low (e.g. 300 dpi) resolution (it was formerly believed that hand-tuned bitmap fonts were required for this task).
PostScript's combination of technical merits and widespread availability made it the language of choice for graphical output until PDF appeared.
The Postscript point, 1/72 inch, is slightly different from other point units.
An introduction (http://cs.indiana.edu/docproject/programming/postscript/postscript.html).
["PostScript Language Reference Manual" ("The Red Book"), Adobe Systems, A-W 1985].
[Jargon File]
(2002-03-11)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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