Http://www.cnblogs.com/shaoge/archive/2009/08/13/1545032.html
Alpha is alpha, beta is Beta
ALPHA: the internal beta version, which is generally not released to the outside. There are many bugs. It is not recommended unless you are a tester.
Alpha is the first character in the Greek alphabet. It is used to represent the initial version. It is generally used for internal testing by software companies.
CTP: Community test PreviewCommunityThe test version is a general test version.
BETA: This is the most widely heard word. It is easy to understand that it is the test version. New features will be added to the version at this stage.
RC :( Release Candidate) candidate indicates a candidate, which is a candidate version in software. Release Candidate is a candidate release version. The biggest difference from the beta version is that new features will always be added in the beta stage, but in the RC version, new features will almost not be added, but the main focus is on debugging!
RTM: release to manufacture. It is a version for a large number of flags in the factory. The content is the same as that of the official version, but the RTM. There is also a ** day evaluation version. However, the RTM test version is incorrect. Does it take some time to compress, package, and distribute the tablets before they are officially launched in a retail store? SoProgramCodeIt must be completed some time before the official release. The program code completed is called final. Code. After the program code is developed, the master chip needs to be sent to the factory for a large number of flags. This version is called the RTM version. Therefore, the code of the RTM version must be the same as that of the official version.