HardwareAndData - ComputerBasics Processing 1...

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Computer Basics Computer Hardware and Information  Processing 1
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2 What do we already know? Computers in Retail Computers in Shipping Computers in the Arts Computers in Law Enforcement Computers in Education Computers in Science Computers in Medicine Computers at Home Computers in Travel
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3 Computer Skills What skills do you feel are necessary to survive in "whatever"?
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I want to buy a computer. What's this all mean? The 2.66 GHz, 15-inch MacBook Pro, for a suggested retail price of $,$$$(US), includes: * 15.4-inch widescreen LED-backlit 1440 x 900 glossy display; * 2.66 GHz Intel Core i7 with 4MB shared L3 cache; * 4GB 1066 MHz DDR3 SDRAM, expandable to 8GB; * integrated Intel HD Graphics + NVIDIA GeForce GT 330M discrete graphics with 512MB of VRAM; * 500GB serial ATA hard drive running at 5400 rpm, with Sudden Motion Sensor; * a slot-load 8X SuperDrive with double-layer support (DVD+/-R DL/DVD+/-RW/CD-RW) optical drive; * Mini DisplayPort (VGA, DVshareI and HDMI adapters sold separately); 4
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Principal Components of a Computer Mouse Keyboard Scanner Hard Disk USB drive Monitor Printer Speakers 5
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6 How does a computer work? Data is input. Input devices Data is processed. CPU Data is output. Output devices Data is stored. Memory
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Data is processed CPU Control Unit Fetches an instruction Fetches data Executes the instruction ALU (Arithmetic/Logic Unit) Performs the "math" Transforms/transfers information when needed Registers Memory locations reserved for what the CPU is currently using; Information constantly being copied back and forth between registers and main memory across a collection of wires (bus). 7 Control Unit CU Registers ALU
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8 Data is processed The "brain" of the computer CPU (Central Processing Unit) locates and executes program instructions carries out arithmetic operations accepts and returns data Speed measured in Gigahertz (GHz) how many billions of instructions a CPU can process in a second 2.2 GHz CPU can process ~2.2 billion simple instructions in a second.
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