What is open source software?

Program code made publicly available for free; it can be copied, distributed, or changed without the stringent copyright protections of proprietary software products.

A small program that groups a series of commands to run as a single command.

Software applications tailored to the specific needs of a particular company or industry.

$($D$)$ Programs that include image$-,$ video$-,$ and audio$-$editing software, animation software, and other specialty software required to produce computer games, animations, and movies.