David A. Wheeler (born 1965) is a computer scientist. He works on open source software, free-libre software, and computer security.
In 2006, Wheeler posted "Nearly all FLOSS is Commercial" on his webpage. This is a critical issue in U.S. federal government acquisitions, because the U.S. government has laws and policies that prefer the acquisition of commercial items. He argues that FLOSS is defined as commercial softwarecommercial software by the government's own rules, and believes that no one else had clearly articulated that before him.