Data Entry, Output, Storage and Memory

897 WordsFeb 24, 20084 Pages
Data entry Data entry or input is the process by which raw data is captured and recorded. Input can be an automated or manual process. Regardless of what type of input is selected, accuracy is critical to the desired output. (Stair & Reynolds, 2006). The type of data to be entered determines the data input method. For example, printed questionnaires are best suited for manual data entry. Questionnaires tend to be unstructured and may require interpretation by the survey issuer. An example of data that is better suited to electronic entry is bank checks. A high volume of checks means more instances of error in data entry. Today, check images are used instead of actual checks, reducing errors and the length of time it takes to clear for…show more content…
Tape is good for storage of large quantities of data that do not need to be accessed regularly. Speed and memory Memory and clock cycle are the major players that determine the speed of a computer. Random access memory or RAM is controlled by bus width and bus speed. (Tyson, 2007). The width of a bus is the number of bits that can be sent to the CPU simultaneously and the bus speed refers to the number of times a group can be sent each second. A bus cycle occurs every time data moves from memory to the CPU. (Tyson, 2007). RAM and the bus cycle are directly related to the perceived speed of a computer. A clock cycle is the measure of a CPU's processing speed. Processing speed is also known as megahertz. For example, an 800 MHz Pentium III can potentially process 4 bytes simultaneously, 800 million times per second. Clock cycles or megahertz play an important role in the speed of a computer. Storage devices such as the hard drive, CD ROMS and floppy disks can affect how fast a computer functions also. Generally, information is retrieved from the hard drive faster than from CD ROMS or floppy disks. References Brain, M. (2007) How Hard Disks Work. Retrieved October 9, 2007 from http://computer.howstuffworks.com/hard-disk.htm Stair, R. & Reynolds, G. (2006). Fundamentals of Information Systems, Third ed. Chapter 1, pg. 35. Thomson Course Technology. Tyson, J. (2007). How

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