in 1940s .. the entire whole room.

The ENAIC was invented in the University of Pennysylania and begun construction in 1943 and it was completed in 1946.
It occupied about 1800 square feet and used about 18,000 vacuum tubes and weighs about 15tons.
THEN a few years ago.... 17 inches 2500 gram
A few months ago .. 4.5 inch 400 gram
NOW ... 3.5 x 2.5 x 1.5 inches 200 gram