Editing Version control (section)

==Specialized strategies==
Engineering revision control developed from formalized processes based on tracking revisions of early blueprints or [[whiteprint|bluelines]]{{Citation needed|reason=The rest of this paragraph is fairly specific; it sounds almost like it should've been part of an elder engineering book, any sources?|date=December 2017}}. This system of control implicitly allowed returning to an earlier state of the design, for cases in which an engineering dead-end was reached in the development of the design. A revision table was used to keep track of the changes made. Additionally, the modified areas of the drawing were highlighted using revision clouds.

===In Business and Law===
Version control is widespread in business and law. Indeed, "contract redline" and "legal blackline" are some of the earliest forms of revision control,<ref>For Engineering drawings, see [[Whiteprint#Document control]], for some of the manual systems in place in the twentieth century, for example, the ''Engineering Procedures'' of [[Hughes Aircraft]], each revision of which required approval by [[Lawrence A. Hyland]]; see also the approval procedures instituted by the U.S. government.</ref> and are still employed in business and law with varying degrees of sophistication.  The most sophisticated techniques are beginning to be used for the electronic tracking of changes to [[CAD file]]s (see [[product data management]]), supplanting the "manual" electronic implementation of traditional revision control.{{citation needed|date=November 2016}}