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Re: [Logic_Cafe] Mac Systems

2005-05-02 by Maurits van de Kamp

> Is a Mac system UNIX based in the same way old Windows systems were DOS
> based?

That's hard to compare. Win311and earlier were really DOS-programs, not 
operating systems. Win95/98 were developed onwards from DOS-code. WinNT and 
the likes are based on a Unix/VMS-like core but rewritten for Microsoft (by 
the original programmer of the VMS kernel) and made to look DOS-based (drive 
letters etc).

The way Unix-derivatives like Mac OSX, Solaris, HPUX, BSD etc work, is that 
their companies bought a licence from Digital (the original creator of Unix) 
to use the Unix kernel sourcecode but modify and expand the system around it 
to make good use of the computer's specifics.

Linux is similar, but its kernel is rewritten from scratch and therefore free.

So the comparison with Windows and MSDOS would best fit Win95/98/ME, where the 
DOS-code can still be found inside (although with every release, Microsoft 
tried to convince us that MSDOS was completely gone, it was just 
compatible). :o)

Maurits.

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