today's laptop have A common source: Dynabook .
Alan Kay, a former computer scientist at Xerox PARC, proposed the concept of the portable computer in 1968.
computer weighed 100 pounds at the time, use of or punch card, Kay envisioned portable computer weight less than 2 pounds of , Displays 1-Mpixel color, which he calls Dynabook.
Although the Dynabook was never built, it inspired what we call the laptop computer today.
Despite advances in technology, it took us 40 years to get computers below two pounds.