Shareware comes with strings attached, which you accept when you install or run the program. Commonly, these may include the condition that you must pay to continue to use it after an initial free trial period, or that you pay if you intend to use it commercially. (Quelle: The Rough Guide to The Internet, Rough Guides, 9. Auflage 2003, Rough Guides Verlag, ISBN: 978-1843531012, Kapitel Free and almost free, Seite 264 f.)