EPS, which stands for Encapsulated PostScript, is a file format for graphic data which uses a technology known as PostScript. It carries the extension, .eps. Because it can include vector data and bit map data, it is used as the file format for both

DPI stands for dots per inch and is a unit which is used to represent the resolution of input devices, such as scanners, and of output devices, such as monitors and printers. It is sometimes used in the same sense as PPI (pixels per inch), a unit of

A byte is a unit of information in computing. Generally, 1 byte consists of 8 bits and can express 8 binary digits (i.e. 256 types) of information. If used to express whole numbers, a single byte can express 256 whole numbers (e.g. 0 to 255, -128 to

BMP is the standard file format for bit map data in Windows (There is also a slightly different BMP in the OS/2 format). It carries the extension, .bmp. BMP files can be viewed and edited with the Windows accessory program, MS Paint, and is compatibl

This is the process of converting analog data such as images and audio into digital data is called analog-digital (A-D) conversion. A-D conversion is performed via two processes: sampling and quantization. Quantization is the process of converting sa

The process of converting analog data such as images and audio into digital data is called analog-digital (A-D) conversion. A-D conversion is performed via two processes: sampling and quantization. Sampling is the process of measuring continuously ch

Hertz (Hz) is a unit of frequency and is used to indicate the frequency of sound waves and electromagnetic waves, etc. A single wave or vibration cycle in one second is represented as 1Hz. This unit is often used in connection with computers to in

When the word, "dot", is used in relation to computer images and data input/output devices, "dot" can be assumed to indicate the smallest element in designating precision. The unit, dpi (dots per inch), for example, is used for the resolution of b

Digital Versatile Disc (DVD), or DVD-Video as it is known, is an optical recording medium capable of recording videos over an extended period. Its media composition, geometry and data recording and reading methods are basically the same as those o

The compression method in which the original data can be restored from the compressed data is called lossless compression. It would be meaningless to compress and reduce the size of text and program data if data is lost in the process. That is why lo

A computer handles various data such as text, image, audio and video in files. The specific way in which data is stored in a file is called the file format. All data processed on a computer are binary data that can be expressed in 0s and 1s. In ot

A pixel is the smallest element in the composition of bitmap data. It is an abbreviation of the word, picture element, and the word for it in Japanese is gaso. Digitized bitmap data images read by scanner or from digital camera photographs are typ

TIFF is the abbreviation for Tagged Image File Format and is a bitmap data file format. It carries the extension, .tif. Using codes called tags to recognize data content enables information related to images to be stored in files. It is compatible

PSD is a bitmap data file format and is the native file format to the graphics editing software, Adobe Photoshop. It carries the extension, .psd. It is also known as the Photoshop format. Adobe Photoshop is a multifunctional graphics processing so

CD-Rewritable (CD-RW) is a rewritable medium which uses a metal phase transitioning material in the recording layer (specified in Orange Book Part III) and records information by converting the crystalline state of the material to a non-crystalline (

CD-Recordable (CD-R) (specified in Orange Book Part II) is a recordable medium that uses organic dyes such as azo, cyanine and phthalocyanine on the recording layer and records information by degradation and dissipation of the dye with heat from a la

When a computer processes information, it usually does so by expressing that information in 0s and 1s (binary digit expression). The smallest unit of that information (a single digit of binary data) is called a bit. This is the shortened version of t

DVD-R (DVD-Recordable) is a recordable medium with an organic dye in its recording layer which does not allow data to be rewritten or deleted once it is written on the disc. DVD-RW (DVD-Rewritable), on the other hand, is a rewritable medium with a me

At the dawn of the history of the computer, paper punch tape and cards were used as recording media but today, methods such as magnetic, optical, optical magnetic and semiconductor recording are used in the materials and devices for recording informa

A floppy disk is a removable, rewritable magnetic recording medium comprising a disk-shaped polymer sheet coated with magnetic material on the front and back, encased in a jacket. It is sometimes also referred to as a flexible disk. In the 1970s,

Bitmap data and raster data is the format for displaying images as a cluster of pixels. Images are digitized when photographed by a digital camera or scanned. Sampling and quantizing are required for digitizing analog content. Sampling is the brea

When converting analog sound into digital data, it needs to go through a sampling and quantizing analog - digital (A-D) conversion process. The digitization of sound in this way is known as PCM (Pulse Code Modulation). WAVE is one of the principal

PNG, short for Portable Network Graphics, is a bitmap data file format. The file extension for it is ".png". PNG is a lossless compression file format for use on networks supporting 8-bit and 24-bit colors with the ability to achieve image transpare

DVD-RAM (DVD-Random Access Memory) is a rewritable medium which uses a metal phase transitioning material in the recording layer, has hardware defect management and identical specifications to magnetic recording media. Consequently, data can be delet

DVD+R (DVD Recordable) is a recordable medium with an organic dye in its recording layer which does not allow data to be rewritten or deleted once it is written on the disc. DVD+RW (DVD Rewritable), on the other hand, is a rewritable medium with a me

Generally, the term CD refers to a CD-DA (Compact Disc Digital Audio), but it is also a general term for an optical disc with a diameter of either 80mm or 120mm and a capacity of up to 700MB. CD-ROM, Photo CD, CD-R, and CD-RW are some of the logos an

If data is deleted to reduce the size during compression, that data cannot be restored. This type of compression method in which the original data cannot be restored from the compressed data is referred to as lossy compression. Because image, audio a

Vector graphics data describe shapes in a multidimensional space as coordinates and functions of shape attributes. They are primarily used in applications of the “draw” variety (e.g., Illustrator from Adobe Systems and the open source software Inksca

Among the different types of semiconductor memory recordable media, flash memory is the general name for a group of products including CompactFlash, SD memory cards (including mini and micro), USB data storage drives, which are made up of EEPROM (Ele

A Magneto-Optical Disc (MO) is a removable, rewritable storage medium, which comes in both 5.25-inch and 3.5-inch sizes. The 3.5-inch size is the more commonly used size with personal computers. The discs come in six different sizes of storage capaci

PDF (Portable Document Format) is a file format for electronic documents. PDF files use the “.pdf” filename extension.

Originally released in 1993 by Adobe Systems, Inc., the PDF format is now standardized under t

JPEG is one compression method for bitmap image data files. (Originally it was an acronym of the Joint Photographic Experts Group, which developed the compression format.) The human eye is more sensitive to changes in brightness than in hue, and t

GIF, an abbreviation of Graphics Interchange Format, is one format for bitmap image data files. Its extension is “.gif.” This file format, which utilizes the LZW data compression technique, supports 8-bit (256 color) indexed color. Because it only