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November 6, 2021
July 18, 2016
July 13, 2016
January 8, 2015
December 26, 2010
January 7, 2010
Reverted edits by DanieleGiusto (Talk) to last version by Darkknight
m+92
Removed sentence fragment
m-92
April 21, 2008
July 17, 2007
July 16, 2007
Removed redundant external link (now a reference).
-96
Grammar - still needs work.
+6
List of types of engineers.
+183
Broader definition.
+383
Reads smoother.
-14