Synopsis Mark Dean is a computer scientist and an engineer; he contributed to the development of the color PC monitor and the first gigahertz chip. He also invented the Industry Standard Architecture system that allows computer plug-ins such as disk drives and printers. Dean is recognized for helping with the launch of the personal computer age with work that made the machines more accessible and powerful. Early Life and Education Mark Dean was born on March 2‚ 1957‚ in Jefferson City‚ Tennessee
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Computers (PCs) or Desktop Computers. These are relatively small and inexpensive. They consist of a single processor or a chip The system is normally made up of the microprocessor‚ keyboard‚ VDU one or two floppy disk drives‚ a printer and a hard disk drive. It has a hard disk capacity of 20Mb to 520Mb May use a colour or monochrome cathode ray tube (CRT) Have capabilities for networking. They are single user. They occupy little space. They are capable of multiprogramming.
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Network Server. The grayed out information under "hard disk" shows the free hard disk space. You should have over 200 Megs of free hard disk space. push ok Select device manager and double-click CD-ROM. Try checking or unchecking both DMA and synch data transfer. Click ok/close till the system properties windows are all closed. NOTE: Checking or unchecking DMA may cause a problem with the CD-ROM drive. If this happens reverse that step. Some drives need DMA enabled and some do not. Click Start
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storage. If your computer’s CPU had to constantly access the hard drive to retrieve every piece of data it needs‚ it would operate very slowly. When the information is kept in memory‚ the CPU can access it much more quickly. Most forms of memory are intended to store data temporarily. As you can see in the diagram above‚ the CPU accesses memory according to a distinct hierarchy. Whether it comes from permanent storage (the hard drive) or input (the keyboard)‚ most data goes in random access memory
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unit‚ laptop‚ netbook‚ PDA‚ mobile phone‚ games consoles‚ tablet‚ server‚ embedded devices (inside phones‚ domestic appliances‚ cars) Hardware components: processor speed and type; memory eg RAM‚ cache; storage devices‚ eg hard disk drive‚ memory stick‚ CD ROM‚ flash drive‚ DVD; input devices eg touch screen‚ graphics tablet‚ gaming controller‚ microphone‚ mouse‚ keyboard; output devices eg printer‚ monitor‚ sound; computer network connectivity eg 3G‚ Wireless‚ Bluetooth‚ NIC; costs Software
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provide more space for storage of our possessions or companies are paid for storage spaces. The same can be said about computer information‚ as data accumulates storage needs increases. To satisfy that need‚ larger hard disk drives are bought‚ flash drives‚ optical disks or solid state drives are other alternatives. However‚ in 2007 cloud storage and cloud computing became popular as another way to store and process data (Banerjee‚ 2011). What is the Cloud? “A Cloud is a type of parallel and distributed
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References: HowStuffWorks.com (2008). How Floppy Disk Drives Work. Retrieved September 29‚ 2009‚ from http://www.howstuffworks.com/hard-disk.htm HowStuffWorks.com (2008). How Hard Disk Work. Retrieved September 29‚ 2009‚ from http://computer.howstuffworks.com/hard-disk1.htm HowStuffWorks.com (2008). How CD’s Work. Retrieved September 29‚ 2009‚ from http://electronics.howstuffworks.com/cd6.htm MICR Repository
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Pamphlet of Computer System Architecture (LO3) KEY SYSTEM COMPONENTS: Von Neumann architecture- Model for designing and building computers‚ based on the following three characteristics: * The computer’s four main sub-systems: * Memory * ALU (Arithmetic/Logic Unit) * Control Unit * Input/output System (I/O) * Program is stored in memory during execution. * Program instructions are executed sequentially. VON NEUMANN ARCHITECTURE MEMORY SUBSYSTEM: *
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Touch screen Touch pad Joystick Multimedia devices Pc camera Digital camera Microphone Web cam Automated input devices (devices that capture data directly from source) Optical Mark Reader Magnetic ink Character Reader Bar Code Reader Scanner STUDY HARD AND MAKE YOURSELF PROUD 1 Information Technology CXC notes Optical Character Reader RFID (radio frequency identification) Magnetic Stripe Card Reader Keyboard devices TUTOR: MR. G JAMES Keyboard-: This is an input device that is used
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marketplace they will need to be replaced. These three computers all have internal hard disks with 50GB of storage capacity or less‚ have processors running at speeds of less than 2GHz‚ have less than 2GB of RAM‚ have CD drives‚ and n more than 2 USB ports. I want each to have at least 100GB of storage capacity‚ run at speeds of more than 2GHz‚ have at least 3GB of RAM‚ have at least one of the laptops with a DVD drive‚ and at least 3 USB ports each. I would also like our new computers to all have a
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