Many early computers were big enough to fill a whole room and weighed thousands of pounds.

Because early computers were very large, expensive, and difficult to maintain, most computers belonged to rich families.

Part of the reason computers were so big was that they relied on large ________ to relay information through the system.

In 1947, scientists at Bell Laboratories invented the __________ which made computers smaller.

In 1959, Jack Kilby invented the _______ which made computers much smaller and cheaper.

In 1977, three successful personal computers were released: __________, the TRS-80 Model 1, and the Commodore Pet 2001.

In the mid-nineties, ____________ became available to the public.

In 2007, Apple released their first ______ so people could access the Internet from anywhere using a device small enough to fit in their pocket.

In 1911, Hollerith founded the Tabulating Machine company, which eventually became _____.