OpenSource

Open source ComputerSoftware is nominally owned by one entity, such as the Free Software Foundation, and then licensed out according to an open source license; the license gives the user free use of the software as well access to the Source code, so that the software can then be further developed by whoever is interested. (This needs to be expanded.)

The open source movement is a large movement of programmers and other computer users to give easy access to ComputerSoftware.

There is widespread agreement, but some tension, between the open source movement and the free software movement.

Among the relevant topics:

Donald E Knuth, Richard Stallman, Linus Torvalds, Eric Raymond, Paul Vixie

The GNUProjecT (see also GNU), the GPL, Free Software Foundation, Debian Linux distribution, FreeBSD

Open Source Software: Emacs, TeX, Vim, Apache, XFree, Gimp, PHP...

''Please delete this note after confirmation/disconfirmation:

I'm not sure that TeX is OpenSource.''