Version number

A version number identifies the order in which versions, updates, or upgrades are released. This usually consists of four number separated by periods. These numbers are primary numbers, secondary numbers, build numbers and service pack number.

The primary version is the major release. Often, this includes large additions, alterations or deletions.

The secondary version represents minor edits to the program. These can include revisions, additions, notes, etc. This number is usually changed more often than the primary number, since patches and updates can occur.