| A | B |
| vacuum tubes were replaced with these | transistors |
| Howard Aiken invented this machine | Mark I |
| It was not all electric | Mark I |
| First all electric computer | ENIAC |
| when the term "computer" came into use | after 1946 |
| Neumann's machine stored data | EDVAC |
| Neumann's machine used this number system | binary number system |
| 40's+50's, big and bulky, used vacuum tubes | 1st generation |
| 50's+60's, used transistors, smaller, faster and more reliable | 2nd generation |
| 60's, integrated circuits, smaller, faster, more economical | 3rd generation |
| Three technological advances | vacuum tubes, transistors, IC |