01:198:170 Chapter Notes - Chapter 1, 2, 7: Herman Hollerith, Punched Card, Computer Hardware

• School: Rutgers University
• Department: Computer Science
• Course: 01:198:170
• Professor: G Fuentes

Document Summary

Digitizing information: digital information data represented using numbers, getting a machine to read digital information was the breakthrough, herman hollerith is generally credited with the first production application of digital information. He invented machine to tabulate data based on holes punched in cards (used for 1890 census allow analysis to be completed in one year vs. 8 years without). Device is not a computer but a card reader and stacker, detecting the presence or absence of a hole in a card. Stored-program computers: all hardware at the time, tabulating machines were electro-mechanical devices all hardware built out of wires, rollers and motors. Invented 1956 by three bell lab scientists semiconductor transistor (bardeen, brattain, and. Changed electronics dramatically: solved many problems, lower power, meaning less heat, extremely reliable, small in size and weight, made computers cheaper and smaller and more reliable compared to predecessors.