| A | B |
|---|
| Herman Hollerith | the first American to contribute to the invention of computers |
| Pascaline | first mechanical calculating machine |
| Charles Babbage | known as the Father of Computers due to his plans and design of the DIfference Engine & Analytical Engine |
| vacuum tubes | electronic device that looked like long light bulbs; controlled the flow of electricity in a computer |
| transistors | replaced vacuum tubes; smaller, used less electricity, more reliable |
| integrated circuit (IC) or chip | contains circuits or pathways upon which electricity flows throughout a computer |
| microprocessor | an IC that is also memory storage for a computer |
| Herman Hollerith | began a company that we now know today as IBM |
| abacus | invented in China; the first counting and calculating device |
| Difference Engine & Analytical Engine | a design, but was never built due to the fact that the parts needed were not invented yet |
