CGS 2100C Chapter Notes - Chapter 3: Midi, Keyboard Layout, Input Method
Document Summary
Introduction about computer evolution: human beings have chased computation help since the dawn of time. Known as abc (atanasoff-berry computer: 1943- eniac (electronic numerical integrator and computer) completed. Had 18000 vacuum tubes and needed more than 150kw of power. Input: designed to enter instructions/data necessary for computer system to perform. Used to digitize signatures & handwritten things: touch screen technology: based on highly sensitive electronic device embedded into the screen of a monitor. Finger/stylus touch results in a change of electric current and sends to the processor the code of the affected area. Flatbed scanner: takes printed documents/images that are placed on its bed and digitizes their pixels. Wand scanner: scans by moving over the surface of the document. Drum scanners: use photomultipliers tube as image sensor. Resonance causes protons in the body water to align and rest. Highlights importance of business employees to be literate, knowledgeable, and vigilant.
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