>>   Maybe it means "Unix operating systems in general, but especially Linux
>> and Solaris, and from all Linux distros especially Red Hat".
> 
> In my experience, no, it just means the person putting together the list 
> doesn't know what they're talking about, literally. They have a pile of 
> paper with a list of skills different people told them they were looking 
> for, so they wrote them all down.

This seems to be my experience too.

I briefly mentioned on one CV that one of the programs I wrote deleted 
various temp files, including the "web cache". And I got some recruiter 
calling me up claiming that I was ideal for a role because I "know 
cashae", which apparently is some niche programming language used in the 
healthcare system. Way to completely fail to comprehend what I wrote, man!

> Either 
> that, or they're optimizing for search engines, just plugging in what 
> everyone might search for.

That too. Lots and lots of these things start with a long list of search 
terms before the [vaguely] human-readable part starts.

Reading these adverts, one gets the impression of some underpaid nobody 
hurridly scribbling down text all day without the slightest clue what 
they're talking about, and without bothering with such niceties as 
spelling and grammar.

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