Format: X.Y.Z X: major version; increased when incompatible change which can’t be released in MINOR Y: minor version; increased every christmas, may be API incompatible (always ABI incompatible) Z: teeny; security or bug fix which maintains API compatibility

Format: X.Y.ZpP X: major version; may increment in the future Y: minor version; incremented with large improvement Z: teeny; incremented with each release P: patch level; incremented with each patch for the release

• preview: It is alpha or beta release. Feedback is welcome, it can be reflect to the final release.
• rc: Release Candidate; The feature of the final release is already frozen (feature freeze). Bug reports are still welcome. Feedback for newly added feature is also welcome.
• RTM: Release to Manufacture; p0 (patch level 0); GM (Golden Master); the final release.