| A | B |
|---|
| Gracie Hopper | ADA was named in her honor |
| Herman Hollerith | Founder of IBM |
| Lady Ada Lovelace | First programmer |
| Charles Babbage | Envisioned modern computer in 1850's |
| Blaise Pascal | Mechanical adding/subtracting machine |
| Bill Gates | Founder of Microsoft |
| Steven Jobs and Stephen Wozniak | Founders of Apple |
| abacus | First computer |
| Howard Aiken | Mark I |
| First generation of computers | vacuum tubes |
| Second generation of computers | transitors |
| Third generation of computers | silicon chip |
