EECS 1520 Chapter Notes - Chapter 1: Management System, Urt, Ath

• School: York University
• Department: Electrical Engineering and Computer Science
• Course: EECS 1520
• Professor: Roger Lew

Document Summary

Abstraction- a mental model that removes complex details. Materials used to make device (printer, keyboard, wires) Software- programs that provide the instructions that a computer executes. Blaise pascal (mid 17th century)- mechanical device to add, subtract, divide & multiply. Joseph jacquard (late 18th century) - developed jacquard"s loom. Series of cards with holes punched in them. Harvard mark i, eniac, univac i- early computer launch era in mathematics, physics, engineering and economics. Vacuum tubes used for processing, use a lot of heat. A lot of power used to cool/ run. Magnetic drum- primary memory device that rotates under a read/write head. Machine language- systems software programs written in binary (1s and 0s) System programmers (builds tools) & applications programmers (uses tools) Operating systems allows you to use programs- takes care of the details. From vacuum tubes to transistors (replaced the vacuum tube) fast, small, durable, cheap. From magnetic drums to magnetic cores (replaced magnetic drums)