Self, Society, Service & God. Created in the late 1960's and modified in the mid-1970's. Registered as a trademark.
Here is a terrific interpretations of Our Symbol:
Steps = Self,
Traditions = Society,
Concepts = Service
Greg P. suggests, "Perhaps we need to explore the fourth side - God.
And our unique approach to spirituality".

This image is from the 2nd of July, 2003 in the Sails Pavilion of San Diego Convention Center. Crews were setting up for WCNA-30. This Symbol would eventually be hoisted to the ceiling and moved to the center of the room.
Among other things, this room was used for large speaker meetings during the day and a Richie H'. performance called the Jazz Breakfast.