Is there a manual for Blender 2.72 anywhere. I cannot use the latest version of Blender on my computer as the graphics card is not compatible. 2.72 appears to run OK but all the links to the manual point to the latest on-line manual for 2.79
The information you're after is all available, but it does cost a bit more investment of time & skills to get access to it.
You can access the repository of the manual at https://developer.blender.org/diffusion/BM/. You can do a checkout of the manual as it was at the time of 2.72, and build the HTML pages yourself.
BF never cared about versioning manuals (there were discussions on mailing lists, when they dismissed the wiki manual for the new one), so you could only hope nothing changes much between releases...
It would be not impossible, the current doc system supports it (and even PDF export, but they didn't add that anyway, discussions even here...) and many other FLOSS projects use the same system (readthedocs) and usually all have versioning, languages and pdf...
they just think, imho, that anyone should use latest versions only, and upgrade hardware if necessary. Always.
Of course it could make sense have version-specific docs, in particular when UI or tools change a lot, but I think there's no manual around about 2.4x version (very different UI and tools), too, even if someone could need it (!) because some addons are still not ported to 2.5+, today. Sometimes is asked here too.
The future 2.8+ versions will change a lot again (less in UI, more in tools), and since OpenGL requirements are increased again a lot, let's hope the 2.7x manual will be kept around for who can't run 2.8 at launch.
At home, I'm stuck at 2.76b (crappy old notebook) since it's supporting OpenGL 1.4 maximum. I guess that avoiding GPU computing, your card should support at least 1.4 as well... ?