The accuracy of data input is crucial. "Web applications are notorious for taking practically any type of input, assuming that it's valid, and processing it further" (Beaver, 2006).
If individuals who develop Web applications do not validate input, the result can be a great blunder (Beaver, 2006). Mistakes like this may end up being malicious database manipulation, system crashes and even database corruption (Beaver, 2006).
There are several ways to gather information. Each situation is best dealt with using a specific method of data input. The Optical Data Readers is the appropriate method to use for printed questionnaires. According to the required text for this class Fundamentals of Information Processing:The two categories of optical data readers are for optical mark recognition (OMR) and optical character recognition (OCR). People completing OMR forms use pencils to fill in boxes on OMR paper, which is also called a "mark sense form." OMR is used in standardized tests (including SAT and GMAT tests), surveys, and census taking. In comparison, most OCR readers use reflected light to recognize various characters. With special software, OCR readers can convert handwritten or typed documents into digital data" (Stair & Reynolds, 2006).
When in the situation of telephone surveys the best method of data input is a voice-recognition tool. A voice recognition apparatus uses special software with a microphone to translate the reverberation of a person's voice to a digital signal. This method is the appropriate choice of data input since the devices record and change the input of a human's voice during the actual telephone survey (Stair & Reynolds, 2006).
The situation of bank checks requires a method, which reads and inputs data quickly. This would be the use of a Magnetic Ink Character Recognition (MICR) device. When using this method, the data is positioned at the bottom of a check by way of a special magnetic ink (Stair & Reynolds, 2006). This special ink allows the printed data to be read by both computers and people by using a special character set (Stair & Reynolds, 2006).
Bar code scanners are the best methods for retail tags. To read a bar code label on retail tags, the scanner uses a laser. Retail businesses can use this type of technology to direct and monitor items by scanning the retail tags when any merchandise leaves and enters the establishment (Stair & Reynolds, 2006). This is the best method to use in the situation of retail tags because the system allows the business to keep track of the store's inventory (Stair & Reynolds, 2006).
The appropriate method to use is a scanning device when inputting data from a long document. A scanning device functions much like a photo machine. The document is positioned into the scanner, which scans the data into a computer. The scanners are able to transfer monochrome or color photos, test, forms and other images into computer readable figures. Many businesses use scanners to help control documents and reduce the expensive cost of using and disbursing paper (Stair & Reynolds, 2006). Having covered the methods of data input, this paper will now examine some of the methods of output.
The convenience and quality of output are essential. For a handheld computer the best method of output is a liquid crystal display (LCD). These devices are flat panel displays...