Let's see if you remember this CPU...

ill fate PC-DOS

Then OS/2

Know who developed PC-DOS? Its Bill Gates!

My first computer was DEC Rainbow 100 using CP/M, that was little before DOS, then I really got involved PDP 11 OS'es Like PDP 11/40, 11/70 and such...
 
TRS stood for Tandy Radio Shack if my memory serves right
That and "Trash." (Don't shoot the messenger; that was part of the nickname for the TRS 80--it was Trash 80.)
 
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