QED
Q.E.D.
Q.E.D. is an initialism of the Latin phrase, originating from the Greek analogous hóper édei deîxai, meaning "which had to be demonstrated". The phrase is traditionally placed in its abbreviated form at the end of a mathematical proof or philosophical argument when what was specified in the enunciation — and in the setting-out—has been exactly restated as the conclusion of the demonstration. The abbreviation thus signals the completion of the proof. An example of Q.E.D. signifying the successful completion of a geometry proof is available in Chapter 2 of the Wikibooks Geometry text.The above text is a snippet from Wikipedia: Q.E.D.
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QED
QED is a line-oriented computer text editor that was developed by Butler Lampson and L. Peter Deutsch for the Berkeley Timesharing System running on the SDS 940. It was implemented by L. Peter Deutsch and Dana Angluin between 1965 and 1966.The above text is a snippet from Wikipedia: QED (text editor)
and as such is available under the Creative Commons Attribution/Share-Alike License.