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A computer's software refers to a program (or a bunch of programs) which give a computer instructions on what to do and how one can operate. Software programs can provide one essential task, or a number of principal tasks.  
  
For example, a program designed to edit digital photographs has one key task (i.e. to permit for editing of photos) - naturally it would have quite a few sub-tasks though (i.e. red eye removal, colour correction features, resizing and cropping/chopping of an image).  
  
Alternatively, a computer's operating system (a fancy piece of software which basically handles and runs your complete pc) would carry out many principal tasks - for example handling input and output (i.e. the person typing in with a keyword, or audio popping out of speakers), memory allocation, managing the pc's hardware elements (these are the electrical elements which power a pc) and far more.  
  
Software might be grouped into roughly teams: application software and systems software. Essentially, software which facilitates just one major task (for example, photo editing software as within the above instance) can be counted as application software. This is contrasted to systems software which refers to complicated, multi-task programs which assist to run the complete system - reminiscent of an working system.  
  
These two principal groups of software are mentioned in more detail beneath:  
  
Application Software  
  
This is software which is installed on an operating system (See "Systems Software" beneath for more information). As mentioned above, this type of software tends to perform just one essential task. One other instance of application software could be a website browser: this is the program which you are probably using proper now to view this article. Examples of a browser include Internet Explorer, Google Chrome and Mozilla Firefox. In short, their main task/perform is to facilitate you in surfing the internet.  
  
Other types of application software are as follows:  
  
Word Processing - this type of software means that you can type up documents and letters. Examples include Microsoft Office Word and Open Office.  
Antivirus Software - this type of software helps protect your pc system towards malicious threats similar to viruses and malware. Examples embrace Norton Antivirus, Kaspersky Antivirus and AVG Anti-virus.  
Photo Editing - this type of software can be utilized to edit and manipulate photos and other digital images in varied ways. Examples embrace Paint.net, Corel PaintShop Pro and Adobe Photoshop.  
Systems Software  
  
This type of software is quite accurately described as being on the very core of any laptop system. Without systems software, a pc couldn't really function. In brief, it manages every side of a computer system - from how the hardware interacts with the software ('drivers') to giving the user an interface and platform to work together with the system ('operating system'). The operating system - or 'OS' - is the software that loads up after your laptop is switched on. It is where all application software is put in on. Examples of an OS embody Microsoft Windows (XP, Vista, 7 and so forth), Linux (Ubuntu, CentOS) and Apple Mac OS X.  
  
Other types of systems software embrace machine drives (these make the hardware parts operate correctly with the software and pc system) and utilities (these are additionally called 'utility tools' and so they assist monitor, maintain, check and analyze totally different parts of a pc; similar to 'Task Manager' and 'Disk Defragment on Windows OSes).  
  
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