01:198:170 Chapter Notes - Chapter 1-2: Punched Card, Graphical User Interface, Generation Loss

• School: Rutgers University
• Department: Computer Science
• Course: 01:198:170
• Professor: S Stoll

Document Summary

Digital information is data represented using numbers. Herman hollerith used punch card to digitize census data by using the concept of preset and absence. Computers input data, decode, process, and output. Hardware built out of wires, rollers, and motors. Software is a collective term for programs, the instructions computers perform to implement applications. At first, computers were big, expensive, and burned out. Then transistors improved the computer by low power, less heat, extremely reliable, and small in size and weight. Downfall, a lot of assembly due to integrated circuits. Vacuum tubes transistors integrated circuits. Software development applies a layered approach in which programs at one level apply code for the more primitive operations from lower levels, and provide more advanced facilities for higher levels. Algorithm is a precise and systematic method for producing a specific result. Abstract is to remove the basic concept, idea, or process from a situation.