Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A software release is the distribution (whether public or private) of an initial or upgraded version of a computer software product. The software engineers and company doing the work decide on how to distribute the program or system, or changes to that pre downloads and compact discs. The software release life cycle is composed of different stages that describe the stability of a piece of software and the amount as the development process proceeds.