meaning of post order traversal

1. post-order traversal traversal POSTQUEL POSTGRES QUERy Language. The language used by the POSTGRES database system. ["The Design of POSTGRES", M. Stonebraker et al, Proc ACM SIGMOD Conf, June 1986]. Version 4. 0 ftp://postgres. berkeley. edu/pub/postgresv4r0. tar. Z. PostScript 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. PostScripts 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://www. cs. indiana. edu/docproject/programming/postscript/p ["PostScript Language Reference Manual" "The Red Book", Adobe Systems, A-W 1985]. [Jargon File]

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