• Reiki 3 Manual - Free Reiki Course

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SOFTWARE Sometimes abbreviated as SW and S/W, software is a collection of instructions that enable the user to interact with a computer, its hardware, or perform tasks. Without software, computers would be useless.

Reiki 3 Manual - Free Reiki Course

For example, without your Internet browser, you could not surf the Internet or read this page and without an operating system, the browser could not run on your computer. The picture to the right is a Microsoft Excel software box and an example of a spreadsheet software program. Computer software is made of one or more computer programs. Sometimes it means one specific program, or it can mean all the software on a computer, including the applications and the operating system. Applications are programs that do a specific thing, such as a game or a word processor.

The operating system (Mac OS, Microsoft Windows, Linux, etc.) is software that helps the applications run, and controls the display and the keyboard. The word software was first used in the late 1960s to show the difference from computer hardware, which are the parts of a machine that can be seen and touched. Software is the instructions that the computer follows. Before compact discs (CDs) or Internet downloads, software came on various computer data storage media like paper punch cards, magnetic discs or magnetic tape. The word firmware is sometimes used to describe a style of software that is made specially for a particular type of computer (or other electronic device) and is usually stored on a Flash memory or ROM chip in the computer. Firmware usually refers to a piece of software that directly controls a piece of hardware, for example the firmware for a CD drive or the firmware for a modem. Categories Computer software can be put into categories based on common function, type, or field of use.

There are three broad classifications: Application software are the computer programs for performing user tasks such as word processing and web browsers. System software is used to start and run computer systems and networks. This includes operating systems. Computer programming tools (also known as Development Software) are used to create application and system software.

This is done by translating and combining computer program source code and libraries into executable RAMs. These include compilers and linkers. Software can be thought of as the variable part of a computer and hardware the invariable part.

Software is often divided into application software (programs that do work users are directly interested in) and system software (which includes operating systems and any program that supports application software). The term middleware is sometimes used to describe programming that mediates between application and system software or between two different kinds of application software (for example, sending a remote work request from an application in a computer that has one kind of operating system to an application in a computer with a different operating system). An additional and difficult-to-classify category of software is the utility, which is a small useful program with limited capability. Some utilities come with operating systems.

Like applications, utilities tend to be separately installable and capable of being used independently from the rest of the operating system. Applets are small applications that sometimes come with the operating system as 'accessories.' They can also be created independently using the Java or other programming languages. Software can be purchased or acquired as shareware (usually intended for sale after a trial period), liteware (shareware with some capabilities disabled), freeware (free software but with copyright restrictions), public domain software (free with no restrictions), and open source (software where the source code is furnished and users agree not to limit the distribution of improvements). Software is often packaged on CD-ROMs and diskettes.

Today, much purchased software, shareware, and freeware is downloaded over the Internet. A new trend is software that is made available for use at another site known as an application service provider.