Well, IIRC, the ANSI X3J3 (FORTRAN) spec says that a
human being is
also considered to be a "computer" as well. :) But I'm hardly
lighter than 120g, nor smaller than a smartphone!
That, I believe was the original definition (particularly in the sense of
'somebody who operates a computing machine'). Similarly a 'Typewriter'
was a person who operates a typing machine.
-tony