Authors:

UNIVAC: a device, which contained 20,000 vacuum tubes, occupied 1,500 square feet and weighed 40 tons; there was also a laptop version weighing 27 tons.

Dave Barry (2010). “Dave Barry in Cyberspace”, p.21, Ballantine Books
UNIVAC: a device, which contained 20,000 vacuum tubes, occupied 1,500 square feet and weighed 40 tons; there was also a laptop version weighing 27 tons.