peta-
prefix
Nearby terms:
PERT « pessimal « pessimising compiler « peta-
» petabyte » petaflops » petdingo
petabyte
<unit> 2^50 = 1,125,899,906,842,624 bytes = 1024 terabytes or roughly
10^15 bytes.
See prefix.
(1996-08-12)
Nearby terms:
pessimal « pessimising compiler « peta- «
petabyte » petaflops » petdingo » Peter Chen
petaflops
<unit> 10^15 flops or 1000 teraflops. No computer has achieved this
performance yet.
(1997-07-21)
Nearby terms:
pessimising compiler « peta- « petabyte «
petaflops » petdingo » Peter Chen » Petri net
petdingo
<tool> An Estelle to C++ translator.
(1997-01-24)
Nearby terms:
peta- « petabyte « petaflops « petdingo »
Peter Chen » Petri net » PETSCII
Peter Chen
<person> The developer of the Entity-Relationship model.
(1995-02-07)
Nearby terms:
petabyte « petaflops « petdingo « Peter Chen
» Petri net » PETSCII » PEX
Petri net
<parallel, simulation> A directed, bipartite graph in which nodes are
either "places" (represented by circles) or "transitions" (represented by
rectangles), invented by Carl Adam Petri. A Petri net is marked by placing
"tokens" on places. When all the places with arcs to a transition (its input
places) have a token, the transition "fires", removing a token from each input
place and adding a token to each place pointed to by the transition (its output
places).
Petri nets are used to model concurrent systems, particularly network protocols.
Variants on the basic idea include the coloured Petri Net, Time Petri Net, Timed
Petri Net, Stochastic Petri Net, and Predicate Transition Net.
FAQ.
(1996-09-10)
Nearby terms:
petaflops « petdingo « Peter Chen « Petri net
» PETSCII » PEX » pf
PETSCII
<character> /pet'skee/ PET ASCII. The variation (many would say
perversion) of the ASCII character set used by the Commodore Business Machines'
PET series of personal computers and the later Commodore 64, Commodore 16, and
Commodore 128 computers. The PETSCII set used left-arrow and up-arrow (as in
old-style ASCII) instead of underscore and caret, placed the unshifted alphabet
at positions 65--90, put the shifted alphabet at positions 193--218, and added
graphic characters.
[Jargon File]
(1995-10-29)
Nearby terms:
petdingo « Peter Chen « Petri net « PETSCII »
PEX » pf » PFE
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