Õ: vältida tuleks "vabavara", mis käibib mitmes eri tähenduses

olemus
vaba tarkvara lähtekoodtarkvarana
=
programs that have licenses that allow users to freely run the program for any purpose, modify the program as they want, and also to freely distribute copies of either the original version or their own modified version

ülevaateid
https://en.wikipedia.org/wiki/Free_and_open-source_software

https://www2.cs.siu.edu/~carver/talks/foss.pdf

https://ifap.ru/library/book105.pdf

https://en.wikipedia.org/wiki/List_of_free_and_open-source_software_packages