I made a [meta post](http://meta.math.stackexchange.com/questions/18860/why-do-we-have-separate-complex-integration-and-contour-integration-tags) a while ago about having separate tags for [tag:complex-integration] and [tag:contour-integration]. Based on their use, it seems like they are almost always used in the same context and their tag wikis are almost the same as well. While not all complex integration is about contour integration, e.g. area integrals, it is almost always the case in practice and on this site. [tag:contour-integration] was created over two years ago whereas [tag:complex-integration] was created just a few months ago. As a result I think that [tag:complex-integration] should be deprecated or made a synonym of [tag:contour-integration]. Based on the response contained therein, I think this is a reasonable course of action.

[Here](https://math.stackexchange.com/tags/contour-integration/synonyms) is the tag synonym page on which this can be voted.