What Does COTS (Commercial Off-The-Shelf) Mean?

Commercial off-the-shelf (COTS) is marketing lingo for turnkey software and hardware that can be purchased, leased or licensed by the general public.

Techopedia Explains COTS (Commercial Off-The-Shelf)

The decision about whether to use a COTS product or build something custom should be based on the needs of the user and the cost-effectiveness of building a custom solution.