notes, class 1

http://www.cs.qc.edu/tutors.html

things a computer needs
input
output
memory
control
math ability

von Neumann architecture
http://en.wikipedia.org/wiki/Von_Neumann_architecture
CPU (central processing unit):
    ALU - arithmetic / logic unit
    control unit
memory (RAM)
    bus

http://en.wikipedia.org/wiki/Computer#History_of_computing