This document discusses media art software and its role in digital art. It begins by noting that artists have always created their own tools, and in the digital era some of these tools are considered "media art software." However, media art software is distinct from both artistic software and general media software. The document explores how media art software can be understood as a media, a form of digital subjectivity, and a "unit operation." It provides examples of media art software and discusses how software reflects culture and ideology. It concludes by proposing ways to document and categorize media art software.