Limits on version numbers

1. How are versions numbered?
2. How should version numbers work?
3. Do version numbers start at 0?

How are versions numbered?

Reading version numbers

The leftmost number (1) is called the major version. The middle number (2) is called the minor version. The rightmost number (3) is called the revision but it may also be referred to as a "point release" or "subminor version".

How should version numbers work?

Version numbers are usually divided into sets of numbers, separated by decimal points. Typically, a change in the leftmost number indicates a major change in the software or driver. Changes in the rightmost number often indicate a minor change. Changes in other numbers represent varying degrees of changes.

Do version numbers start at 0?

Version numbers are a unique name or number assigned to a specific version of the software. There can be public and internal versions but they typically increment from 0 -> ∞ or a — z.