Perhaps the most unique machine ever produced, this is the Commodore PET 2001.
Designed by Chuck Peddle, founder of MOS Technologies 
(later acquired by Commodore and renamed CSG - Commodore Semiconductor Group),
this machine is a large and imposing specimen. 

Introduced almost at the same time as the Apple ][ and Radio Shack TRS-80,
the Commodore PET 2001 had a lot to offer in a time full of "homebrew"
machines: It came with 4K or 8K RAM, BASIC in ROM, had a built in tape drive
for storage / retrieval of programs, a keyboard capable of upper AND lower
case lettering as well as graphics characters (PETSCII - 8 bit / 256 symbols,
where ASCII is 7 bit / 128 symbols) and a built in monochrome monitor.
It was introduced at $595 for the 4K version and $795 for the 8K version. 

Of note is the keyboard, which is more like that of a calculator than
anything else I can think of. It is small and cramped, but many owners
think of this as another great Commodore achievement rather than a hindrance;
no other machine has anything near this keyboard. All personal feeling aside,
it is simply difficult to use. 

(http://www.edu.uni-klu.ac.at/~kseiner/pet2001.html)