Software that can only be run for a limited amount of time before it expires.
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Shareware is a type of proprietary software which is initially provided free of charge to users, who are allowed and encouraged to make and share copies of the program. Shareware is often offered as a download from a website or on a compact disc included with a magazine. Shareware differs from freeware, which is software distributed at no cost to the user but without source code being made available; and open-source software, in which the source code is freely available for anyone to inspect and alter.
There are many types of shareware and, while they may not require an initial up-front payment, many are intended to generate revenue in one way or another. Some limit use to personal non-commercial purposes only, with purchase of a license required for use in a business enterprise. The software itself may be limited in functionality or be time-limited, or it may remind the user that payment would be appreciated.
