| A | B |
|---|
| Aiken | Produced the Mark I machine. |
| Atanasoff & Berry | Developed the ABC that used the binary number system and hundreds of vacuum tubes |
| Babbage | Known as the Father of Computers. |
| Byron | A brilliant mathematician who helped Babbage develop coded-card programs. |
| Hollerith | Developed the forerunner of standard computer cards that were used in machines for tabulating census data. |
| Hopper | Found the first computer bug. |
| Jacquard | Came up with the idea of using cards with holes punched in them to store weaving instructions. |
| Mauchly & Eckert | Developed ENIAC. |
| Pascal | Developed an adding machine in 1642 that was a complicated set of gears similar to a clock. |
| Von Leibniz | Developed the Stepped Reckoner in the 17th Century. |
