Most businesses and families who have added a scanner to their personal computer system, or in our case systems, consider it an invaluable tool for bringing graphics and text into their documents. But no one is expected to plunge into the process of purchasing a scanner blindly. Before you buy you need to consider WHAT KIND OF SCANNER DO WE REQUIRE? WHERE IS THE SCANNER REQUIRED? WHO SHOULD WE BUY THE SCANNER FROM? HOW DO WE INSTALL AND USE IT? AND MOST IMPORTANTLY, WHY DO WE NEED A SCANNER?

The basics of a scanner are simple, a scanner is a devise that converts light (which we see when we look at something) into 0’s and 1’s (which computers use to perform operations). Another way to explain it is scanners convert analog data into digital information. To accomplish that trick, scanners

Although the Epson offers fast scans, good image quality, and a scanning interface that can scan on full automatic or give you as much control as you want, it lacks in additional features such as an automatic document feeder, a document management program, an a power save button. With no power switch; Epson suggest you unplug the unit after use which I feel could become a hassle. I was informed that after performance tests were conducted with the Epson 640U it did far better than most scanners in its class. It managed a notably fast 17 seconds for scanning a 5 by 7-inch photo at 300dpi in color mode and 17 seconds for the 8.5 by 11-inch page in black and white at 300dpi. All things considered, the 640U is not at the very top of its class, but it does offer a combination of features that makes it one of the more attractive choices in its price range of approximately $130.

• Included is an E-mail button which scans the item using settings optimized for e-mail and sends the scan to your e-mail software allowing you to e-mail the image to others

• The there’s the Share-To-Web button which allows the scanned item to be sent to a website

use small electronic components called CCD’s (charge-coupled devices), or CIS’s (contact image sensors) as their “eyes”. These eyes record how much light is reflected off the item being scanned, and report that information to the computer. To capture a whole image, such as a photo of a house for sale, the scanner divides the image into a grid, and uses a row of eyes (called the scanning head) to record how much light is reflected in each location. Once the computer has all that data, it builds a file that represents the image in digital form. Each of the cells in the grid is called a picture element, or pixel. Scanners differ primarily in how many pixels they can measure (their resolution) and in how the actual scanning process takes place.

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