Yes a OS .21 will fit in the revo You may have you adjust the engine mount to get the mesh for the gears right But it is definitely possible!
Yes, it is one of many scheduling algorithms suitable for time sharing.However it is not suitable for scheduling in a hard realtime OS that must consistently meet deadlines.
first in first out
Mac OS is the first operating system developed in the year 1955
android is good but not the best , ios is the worlds most advance os.
Mac OS Leopard
the first OS was made by Microsoft called MS-DOS, released in July of 1981.
If you consider all the versions of Mac OS to be a "line", then the latest series, Mac OS X, would generally fit your description. However, it'd be stretching it a bit to call it "recent"; The first version of Mac OS X was released in 1999.
No Single OS is "best suitable for servers". The choice of an OS depends greatly on the planned uses : each OS has it's various merits, and deficiencies.
XP
windows 95.
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