digital image

A digital image is an illustration of a two-dimensional image as a finite set of digital values, called picture elements or pixels. The digital image contains a fixed number of rows and columns of pixels. Pixels are the smallest individual element in an image, share quantized values that represent the brightness of a given color at any specific point.

Metal

In chemistry, a metal is a ingredient that readily loses electrons to form positive ions and has metallic bonds between metal atoms. Metals form ionic bonds with non-metals. They are sometimes described as a web of positive ions surrounded by a cloud of delocalized electrons. The metals are one of the three groups of elements as eminent by their ionization and bonding properties, along with the metalloids and nonmetals. On the periodic table, a diagonal line drawn from boron separates the metals from the nonmetals. Most elements on this line are metalloids, sometimes called semi-metals; elements to the lower left are metals; elements to the upper right are nonmetals.

Clock synchronization

Clock synchronization is a problem from computer science and engineering which deals with the idea that internal clocks of several computers may be different. Even when initially set accurately, real clocks will differ after some amount of time due to clock drift, caused by clocks counting time at slightly different rates. There are several problems that occur as a consequence of rate differences and several solutions, some being more appropriate than others in certain contexts.

MS-DOS

MS-DOS (Microsoft Disk Operating System) is an operating system commercialized by Microsoft. It was the commonly used member of the DOS family of operating systems and was the dominant operating system for the PC compatible platform during the 1980s. It has gradually been replaced on consumer desktop computers by a variety of generations of the Windows operating system.

MS-DOS was initially released in 1981 and had eight major versions released before Microsoft stopped development in 2000. It was the key product in Microsoft's growth from a programming languages company to varied software development firm, providing the company with essential revenue and marketing resources.