The Sony 
_<A HREF="https://wikipedia.org/wiki/Sony_Vaio_Z_series">Vaio_&nbsp;Z_</A>_&mdash;a
Windows "Ultrabook" that was the main writing and coding machine for 
the _<I>Learning Python, 5th Edition_</I> project.  It ran Windows 7 and 
dual-boot Linux and was a stellar PC, though it required a repair after 
the 1600-page _<A HREF="2013 LP5E Book.jpg.html">LP5E_</A> project blew out 
its keyboard. 

Sony dropped their PC business shortly after this (in response to the 
Windows 8 
_<A HREF="https://google.com/search?q=windows+8+fiasco">fiasco_</A>, perhaps?),
but the Vaio brand is back in business at this writing; see the web for info.