Originally, the word computing was synonymous with counting and calculating, and a computer was a person who computes. Since the advent of the electronic computer, it has come to also mean the operation and usage of these machines, the electrical processes carried out within the computer hardware itself, and the theoretical concepts governing them (computer science).
Science and theory
Other data topics
Classes of computers
Companies - current
Companies - historic
Standards organizations and consortia(see also standardization)
Xtreme Computing (http://www.xtremecomputing.co.uk/) A great computing site with a nice collection of resources.