COMP 228 Lecture Notes - Lecture 2: Mainframe Computer, Laptop, Computer Hardware
12 Apr 2016
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Oxford dictionary: electronic device for storing and processing data, according to instructions given to it in a variable program or non-electronic device that assists in making calculations. They are based on the history of computers, or what we consider to be computers. Early computers : non-electronic & assisted in making calculations. 2 sliding rulers: calculate x, & advanced calculations. Card with holes with data (records for census or for payroll) Mechanical calculating machines (midway between 2 definitions) First computer, built by u. s. army & size of entire room. 1940s: first binary computers: konrad zuse"s z3 & eniac. Desktop computer: modular, stationary computer (system unit, keyboard, monitor & mouse) Desktop pc: big machine & plugged into wall. Laptop computer (notebook or portable): portable computer that runs on rechargeable battery (can be plugged in) contain everything that desktop contains more expensive than desktop computer. **lcds (liquid crystal displays): possible to develop small, flat monitors laptops.
