INPUT DEVICES Barcode reader A barcode reader (or barcode scanner) is an electronic device for reading printed barcodes. Like a flatbed scanner‚ it consists of a light source‚ a lens and a light sensor translating optical impulses into electrical ones. Additionally‚ nearly all barcode readers contain decoder circuitry analyzing the barcode’s image data provided by the sensor and sending the barcode’s content to the scanner’s output port. Biometrics Biometrics[1] (or biometric authentication)[note
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viewing experience with VGA and DVI-D (HDCP)” (Dell‚ n.d.). * Memory – 4GB DDR3 SDRAM at 1600MHz The 4GB DDR3 SDRAM has a faster speed with consistent performance. It uses 30nm technology to use less power (Samsung‚ n.d.). * Hard Drive – 500GB Hard Drive‚ 3.5”‚ 7200rpm‚ SATA “The 500 GB
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all cases‚ the data stored in a data buffer are stored on a physical storage medium. A majority of buffers are implemented in software‚ which typically use the faster RAM to store temporary data‚ due to the much faster access time compared with hard disk drives. Buffers are typically used when there is a difference between the rate at which data is received and the rate at which it can be processed‚ or in the case that these rates are variable‚ for example in a printer spooler or in online video streaming
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replicated to the hard-drive memory of the redundant servers. This replication allows for either server to take control when one of them fails. The dis-advantages for this concept is the extra cost of equipment‚ additional maintenance‚ and the need for constant testing in order to verify functionality in case of emergency. Another form of fail-safe equipment is a server that has been built with Redundant Array of Independent Drives (RAID). This design combines multiple disk drives in order to distribute
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GLOSSARY WORD DEFINITION Address The identification of a particular location in memory where a data item or instruction is stored. Algorithm A sequence of instructions which rigorously defines a solution to a problem. Antiglare screen A polarized screen attached to the front of the monitor‚ which reduces eye strain. Assembler A program which converts ASSEMBLY LANGUAGE into MACHINE CODE to be used by a computer. Automation Computer control of machines
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screen‚ external hard drive. Ease of entry/exit: Limited entry and exit barriers due to the ease of assembling computers. Technology/innovation: Technology is evolving every year in this industry sometimes even every couple of months. Computers are becoming smaller‚ and people are using their phones for more things also. Product characteristics: Each PC is made up of the same basic components but can vary in looks and size. The basic components are the case‚ motherboard‚ CPU‚ RAM‚ disk controller
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Analysis of Hewlett-Packard: The Flight of the Kittyhawk. Maggie Xu February 8‚ 2012 1. Background: The Kittyhawk Project. Hewlett Packard (HP) decided to produce 1.3-inch disk drives to become the market leader in a new market and increase HP’s revenue. Although the market for 1.3-inch disk drives was still unclear and still developing‚ HP decided to organize a special team to develop this new product. This group was multi-talented‚ with the best engineers from every department in the
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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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Unit 6 – Storage Devices & Memory Videos 1.06 and 1.08 covered Storage Devices and Memory. The 1st one covered all the different types of storage devices. It started with hard drives and went on to floppy drives‚ cd’s‚ dvd’s‚ solid state removable and tape drives. It also covered all the interfaces that can be used with them. The video also touched on power connections used to power up the different storage devices. Video 1.08 covered memory. It went through the two different types of memory
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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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