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Automatic Document Feeder (ADF)

An Automatic Document Feeder (ADF) is a mechanism that will automatically feed an original sheet of paper so that a printer can scan some amount of the paper at once.

BIT Depth

The Bit depth describes the number of bits used to represent the color of a single pixel in a bitmapped image. Higher color depth gives a broader range of distinct colors. As the number of bits increases, the number of possible colors becomes…


A bitmapped image format used internally by the Microsoft Windows graphics subsystem (GDI), and used commonly as a simple graphics file format on Windows.

Charge Coupled Device (CCD)

Charge Coupled Device (CCD) is the hardware which captures the image in scanners and digital cameras.


Term used for a toner usage measurement on laser printing. For example, 5% coverage means that an A4 sided paper has about 5% image or text on it. So, if the paper or original has complicated images or lots of text on it, the coverage will be higher and…

Dots Per Inch (DPI)

Measurement of resolution that is used for scanning and printing. Generally, higher DPI results in a higher resolution, more visible detail in the image, and a larger file size.

Duty Cycle

Duty cycle is the page quantity which does not affect printer performance for a month. Generally the printer has the lifespan limitation such as pages per year. The lifespan means the average capacity of print-outs, usually within the warranty period.…


Shades of gray that represent light and dark portions of an image. When color images are converted to grayscale; colors are represented by various shades of gray depending on their brightness.


An image type that simulates grayscale by varying the density of dots in a given area. Highly colored areas consist of a large density of dots, while lighter areas consist of a lower density of dots.


A Hard Disk Drive (HDD) a.k.a. hard drive or hard disk, is a non-volatile storage device. It stores digitally-encoded data on rapidly rotating platters with magnetic surfaces.