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COMPUTER SYSTEM SOFTWARE Computer software (or simply software) is a program that enables a computer to perform a specific task opposed to the physical components of the system (hardware). This includes application software such word processor, which enables a user to perform a task, and system software such as an operating system which enables other software to run properly, by interfacing with hardware and with other software. COMPUTER SYSTEM SOFTWARE RELATIONSHIP TO HARD WARE Computer software is so called in contrast to computer hardware, which encompasses the physical interconnections and devices required to store and execute (or run) the software. In computers, software is loaded into RAM and executed in the central processing unit. At the lowest level, software consists of a machine language specific to an individual processor. A machine language consists of groups of binary values signifying processor instructions (object code), which change the state of the computer from preceding state. Software is an ordered sequence of instructions for changing the state of the computer hardware in a particular sequence. It is usually written in high-level programming language are that easier and more efficient for humans to use (closer to natural language) than machine language. High-level languages are compiled or interpreted into machine language object code. Software may also be written in an assembly language, essentially, a mnemonic representation of a machine language using natural language alphabet. Assembly language must be assembled into object code via an assembler. http://www.techcules.com/computer-system-software/