An operating system (OS) is a part of software which manages the operation of a computer. It controls the hardware and software of a computer, without it a computer would be useless. DOS
Disk operating system (DOS) was released in 1981. It will load from a floppy disk each time a computer starts. DOS uses a command line interface. Command line interface can be difficult to use if you aren’t trained or experienced in using it. DOS is the predecessor to windows. DOS is prior to Windows; Windows was created as an add-on to DOS. This operating system allows direct access to hardware and is compatible with all PC’s. DOS is compatible with all computers and hardware. DOS also uses very little system resources. DOS is an old application so is now out-dated and if you use DOS you can only run one application at a time. Windows
Windows was created by Microsoft which was invented by Bill Gates. Windows was originally made as an add-on the DOS and is now the most popular operating system on the planet. Originally Windows was created as an add-on to DOS but has now become one of the most popular operating systems in the world. Windows is a relatively cheap program and unlike DOS it supports multitasking. Windows is a cheap operating system. Unlike DOS, Windows supports multi-tasking. Windows can be complicated to use at first. Windows makes it easier to run applications than DOS did and it also helps people keep their files safe. Mac OS
Mac OS is Apples main operating system. Mac OS runs on apple products such as iPhones, iPads and iPod touch. The operating system uses less system resources than windows and is generally more stable. Mac OS uses less system resources than Windows. This operating system is also usually more stable than Windows. Mac OS is very user friendly and easy to use. Mac systems are usually more expensive than systems that run windows and Mac’s can’t be upgraded. Mac OS is usually expensive to run and can’t be upgraded.
Linux is based on UNIX and originally written by Linus Torvalds in 1991. Linux was created in 1991 and is UNIX based operating system. One of the most popular versions of Linux is Ubuntu. Linux is a free operating system and is an open source so anybody is free to change or view how it works. Linux is a free operating system. It is an open source, this means that anyone can change or view how it runs. If a virus is released on Linux hundreds of people would immediately make a fix available so this operating system is more secure than others. Linux is more secure than other operating systems because if a virus is released hundreds of people would make a fix available. Linux can be difficult to understand if you are a new user. Command line and GUI operating systems
Command Line- The command line is a command prompt where the user types a command which runs programmes. A command line allows a user to type a command to run programmes. It is cheap to produce and is suitable for expert use as it is quick. Language errors could easily be made by a user and the command language must be learnt and memorised to be able to use it effectively. Mistake could easily be made when using command line interface as it has its own special language. This language should be learnt and memorized in order to be able to use it effectively. Command line interaction is limited to the use of a keyboard. GUI- Graphical user interface (GUI) allows users to interact with the system using the mouse to select objects. GUI has a consistent layout. The desktop layout can be customised by the user to make it better for them. GUI is much easier to use then command line as only valid options are available. GUI requires a better graphics display than a command line as it displays much more on the screen and it requires a more powerful processor. OS functions and services
Machine Management- The operating systems job is to shuffle the resources it has to keep the system running smoothly....
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