Essays / Need assistance finding academic journals on 'operating systems' [3]

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