『作者：RickyZhu 转载务必注明出处和作者』

软件产品的生命周期，我们经常说到Alpha测试，Beta测试（其实还有Gamma, Delta测试），软件发布的时候经常看到RC, RTM,这些究竟是如何界定的，发布阶段到底怎么划分的，我们今天就看看wiki的解释。
A software release is the distribution, whether public or private, of an initial or new and upgraded version of a computer software product. Each time a software program or system is changed, the software engineers and company doing the work decide on how to distribute the program or system, or changes to that program or system. Software patches are one method of distributing the changes, as are downloads and compact discs.
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Software testing is the process of checking software, to verify that it satisfies its requirements and to detect errors.

Software testing is an empirical investigation conducted to provide stakeholders with information about the quality of the product or service under test^[1] , with respect to the context in which it is intended to operate. This includes, but is not limited to, the process of executing a program or application with the intent of finding software bugs.

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Kevin Spacey (born July 26, 1959) is an American actor and film director. He grew up in California, and began his career as a stage actor during the 1980s, before being cast in supporting roles in film and television. He gained critical acclaim in the early 1990s, culminating in his first Oscar for The Usual Suspects (Supporting), followed by a Best Actor Oscar win for American Beauty (1999). He has starred in many other Hollywood films including Se7en, Pay It Forward, L.A. Confidential, and as the villain Lex Luthor in Superman Returns. Since 2003, he has been artistic director of the Old Vic theatre in London.

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