The word autopilot was invented in 1935 for a system that allows a vehicle to steer itself . based on this info what is the most likey meaning of greek prefix auto

The meaning of Greek prefix 'auto-' is 'self'.

Explanation:

The Greek prefix auto- means “self.” If a plane is put on autopilot (a function which enables them to fly themselves), it does not need a human pilot. Similar words with the same prefix include automobile, automotive, etc. Word autobiography, a biography of a person written by that person himself, is another example of the same prefix.