work, authors may seek complementary benefits like recognition from their peers.

In the world of computer programming, copyleft-licensed computer programs are often created by programmers to fill a need they have noticed. Such programs are often published with a copyleft license simply to ensure that subsequent users can also freely use modified versions of that program. This is especially true for authors who wish to prevent proprietarization, or the act of reusing free software and then adding extra restrictions to it, an action prevented