| A | B |
|---|
| John Napier | Napier bones |
| Blaise Pascal | calculating machine |
| Gottfried Leibnez | invented calculus |
| Charles Xavier Thomas | made and arithmometer |
| Joseph Jacquard | Jacquards Loom |
| Charles Babbage | first modern computing device |
| Georg Sheutz | Swedish calculating machine |
| Augusta Ada Byron | first female programmer |
| Herman Hollerith | automatic census bureau |
| Thomas Watson Jr. | IBM |
| Alan Turing | Turing machine |
| George Stibitz | digital calculator |
| John Atanasoff | first electronic calculating machine |
| Dr. Howard Aiken | made Mark 1 Computer for IBM |
| Dr. John Mauchly & Presper Eckert | Iniac |
| John Bardeen, William Shockley, & Walter Brittain | Transistor |
| John von Neumann | stored program concept |
| Dr. Daniel Slotnick | Illiac |
| Robert Noyce & Jack Kilby | first integrated circuit |
| Alan Kay | first interface |
| Grace Hopper | mother of Cobol |
| Ted Hoff | microprocessor |
| Ed Roberts | first P.C. - Altair |
| Donald Knuth | text type-setting system |
| Steve Jobs & Steve Wozniak | started Apple |
| Bill Gates & Paul Allen | microsoft |
| Steve Case | AOL |
| Lawrence Ellison | Oracle |
