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Wednesday, October 19, 2011

System Software


C++

An object-oriented version of C that has been widely used to develop enterprise and commercial applications. Created by Bjarne Stroustrup, C++ became popular because it combined traditional C programming with object-oriented programming (OOP) features. Smalltalk and other OOP languages did not provide the familiar structures of conventional languages such as C and Pascal. Microsoft's Visual C++ is the most widely used C++ language

UNIX

A multiuser, multitasking operating system that is widely used as the master control program in workstations and servers. The Open Group holds the trademark for the UNIX name (spelled in upper case) on behalf of the industry and provides compliance certification to the UNIX standard

LINUX

Linux is the most popular open source operating system. Its source code is available free of charge; however, for a fee, Linux is distributed with technical support and training from commercial vendors such as Red Hat Software (www.redhat.com) and Novell (www.novell.com). A Linux "distribution" is available as a download or on CD or DVD media, which may comprise from a handful to several hundred applications, tools and utilities. Source code for the Linux kernel as well as the auxiliary programs may also be included

DSP

Digital Signal Processing) A category of techniques that analyze signals from sources such as sound, weather satellites and earthquake monitors. Signals are converted into digital data and analyzed using various algorithms such as Fast Fourier Transform.

(Digital Signal Processor) A special-purpose CPU used for digital signal processing applications (see definition #2 below). It provides ultra-fast instruction sequences, such as shift and add, and multiply and add, which are commonly used in math-intensive signal processing. DSP chips are widely used in a myriad of devices, including cellphones, sound cards, fax machines, modems, hard disks and digital TVs. The first DSP chip used in a commercial product was believed to be in the very popular Speak & Spell game, introduced by TI in the late 1970s

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