Software and Computer Hardware |
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Computer
software is so called to contrast with 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 its 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 languages that
are 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 a natural language alphabet. Assembly language must be
assembled into object code via an assembler. The term "software" was first used in this sense by John W. Tukey in 1958.[3] In computer science and software engineering, computer software is all computer programs. The concept of reading different sequences of instructions into the memory of a device to control computations was invented by Charles Babbage as part of his difference engine. The theory that is the basis for most modern software was first proposed by Alan Turing in his 1935 essay Computable numbers with an application to the Entscheidungsproblem. de Wikipedia |
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| Computer
software is a general term used to describe a collection of
computer programs, procedures and documentation that perform
some task on a computer system. The term includes application
software such as word processors which perform productive
tasks for users, system software such as operating systems,
which interface with hardware to provide the necessary
services for application software, and middleware which
controls and co-ordinates distributed systems. de Wikipedia |
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