A legacy computer system is one that is outdated either in terms of hardware or software. At the time of writing, any computer running a version of Windows below Windows 7 is usually considered to be a legacy system, because this is the latest version currently available. (This also applies to computers running earlier versions of any other operating system, such as Linux)
Unlike a lot of other items, which tend to last for a long time, computers seem to go out of date extremely quickly, which can cause problems if equipment is not updated where necessary, especially within businesses.
This is because of a phenomenon known as Moore’s Law, which is the prediction that every 18 months or so, computer capability doubles.
For example, if the most advanced specification available is 1GB Ram with a 2Ghz processor one year, it would be double that value after 18 months.
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