Computer science and programming is a field with a relatively short history but it is developing very rapidly. Is there a repository for existing historical software or somewhere that I could submit software of historical interest?
I've asked this, and answered using the standard SO paradigm, because I thought it would be of general interest to the community.
I am aware of only one repository for historical software, the Software Preservation Group. It contains items of interest for C++, LISP, and Fortran among other topics.
It depends on the exact type of software. Projects like the Multiple Arcade Machine Emulator (MAME) seek to preserve the processor-level instruction sets for specific arcade machine hardware, for example.
Trailing Edge Software maintains public-domain archives of vintage software. Although their front page makes them sound like they are interested in anything, their actual collection seems limited to PDP-10 and PDP-11 codes. I expect the requirement that the software be in the public domain is fairly limiting.
For my own code I just make it public on the web and then ensure the Internet Archive knows of the code. I do so by requesting the URL of it at http://web.archive.org/collections/web.html - after 12-24 months it then should appear at the Internet Archive.