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41 Cards in this Set
- Front
- Back
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Data Origin: The following generate ideas (4) |
Social life and living enviornment Business and education enviornment Knowledge and entertainment Global variables |
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Computer enviornment can be classified into three categories: |
Hardware Software Malware
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Motion detection (3) & Touch detection |
Mouse Trackball Joystick |
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Input |
Instructions and data necessary for the computer to perform and execute applications |
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Chorded keyboard |
Fewer keys (press more then one key for each character) Works like piano |
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Optical Keyboard |
Uses light board and sensors Pressed key blocs light and activate character code |
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Gaming technology pressured computer industry to create: |
Light pen/Light gun Steering wheel and paddle Yoke and aircraft simulator devices Game controller/gamepad |
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3D scanner |
Used for industrial design in engineering projects |
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Drum Scanner |
Use photo-multiplier tube as image sensor |
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DNA Scanner |
Uses CCD (charge coupled device) or photo multipliers to detect microscopic DNA arrays |
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Microphone |
Captures voice, sound, and music and transfers them to an audio device where they are digitized and used in the context of their happening |
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MIDI ( musical instrument digital interface) |
Capture notes and encodes them as digital message into the computer processor and synchronizes the rhythm of multiple devices |
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MIDI Protocol |
Enure that many music devices communicate with each other and with the computer system |
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Bare voice input recognition |
Computer can be taught to recognize spoken words Words must correspond to vocabulary of its dictionary Software application helps complete the performance |
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MRI (magnetic resonance imaging) |
Uses huge magnet to resonance produced by short magnetic field
Resonance causes protons in the body water to align and rest
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Computed tomography (CT) |
Inputs many X-Rays for any penetrating wave processed by the computer to create high precision tomograms for the body |
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Ultrasonography |
Uses non-audible frequencies Used to locate: Obrtuctions Tumors Lesions |
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Motherboard |
Main circuit board of the computer that houses all computer components - Processing components - Wiring between internal/external - Expansion slots - Ports |
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______ is the most important characteristic of the processor |
Processing speed |
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Processing speed |
Defined by processor clock - # of machine cycles a processor can perform in one second
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Machine Cycle |
Fetch Decode (^Instruction operational step) Execute Store (^Execution operational step) |
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Co-Processing |
Assigns some sophisticated time consuming processing to specific processors that help the main processor to tackle tasks |
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GPU (graphics processing unit) |
Co-Processor that, working together with the main processor, accelerates the processing of multimedia and scientific applications |
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Multi-Core technology |
Putting two or more processors on one chip where they form one integrated circuit and they time share its electronic components |
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LED (light emitting diodes) |
Based on clusters of red green and blue diodes working to produce the right color of each pixel.
When the emissive layer used in the diode is a film of organic compound LED becomes OLED (organic light emitting diodes) |
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Cons of LED (4) |
Blue deteriorates fast than other colors causing bad image quality Organic material can be damaged from water Long time exposure to sun damages quality Cost of production is high |
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Output |
Information or action people and businesses want to get out of a computer as a result of processing input data and information |
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Output catergories |
Printed Audio Video |
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LCD (Liquid Crystal Display) |
Uses natural liquid that have the properties of any available liquid but its particles can be oriented and polarized like those of crystal |
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Pros of LCD (4) |
Low power needs Tailored to any size Excellent quality resolution Compact and light weight
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Cons of LCD (4) |
Highly influenced by temp/light Viewing angle is limited Dead pixels Heavy and big volume |
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Plasma |
Uses a layer of ionized gas particles similar to that of florescent lamps as a plant panel compromised between two layers of glass
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Pros of plasma (3) |
Excellent color Fast activation response Highly scalable |
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Cons of plasma (5) |
Large screen Glare and reflection Heavy Consumes more power Extended use lowers quality |
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4 types of printers |
- Dot Matrix/Impact magnetic - One at time. Slow - Inkjet - High pressure/tiny ink partices - Laser Jet - Faster/better quality. Uses laser beam, toner, and rotating drum - LED - Light emitting diodes, toner, rotating drum. Faster, less expensive, reliable |
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RAM (random access memory) |
Must visit/temporary stay for everything in computer system |
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RAM divided into 3 compartments |
OS Input and Output Processing results and interfaces |
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Cache |
Small volatile fast memory checked by processor 2 or 3 levels Most frequent/recent items |
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ROM (Read Only Memory) |
Permanent memory (even when computers off) |
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CMOS (Complementary Metal-Oxide Semi-Conductor) |
Keeps Configuration of the computer system and date/time and their programs |
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Virtual memory |
Store least recently used data *Last checked by processor |
