Need assistance finding academic journals on 'operating systems'

I am a first year student studying Bachelor of Computer Science, I have been given a question on which we must write an essay on. I am having issues finding my academic journals, on which we need (3).

The question is "Evaluate three different operating systems and compare their suitability for small and large organisations".

My chosen operating systems: Windows Linux Mac.

I have found plently of journals (popular) but cannot find any academic journals relating to this subject. Maybe if someone can point me in the right direction

Keywords: windows, linux, mac*, suitability, organisation*, compan*, business*, comparision.

Thanks

Well, I recommend Questia to everyboy, because it is SO comprehensive... but even Questia might not have much about operating systems.

Here is something that might work. Go to Google Scholar, and do a search for "Linux." Then try doing the same thing for "Windows XP," and "Mac OS." This will give you a series of computer science related articles, most from academic journals. A lot of them might not be useful in the sort of comparative essay you are writing, but if you only need three, you should be able to find three that you could work into your paper if you really try.