This document discusses signs, symbols, and visual codes. It divides signs into three categories: symbolic, iconic, and indexical. Symbolic signs have no obvious connection to their meaning, while iconic signs visually resemble what they represent. Indexical signs have a direct connection to what they indicate. Visual codes include dress codes, color codes, and non-verbal communication cues like facial expressions and gestures. Understanding these signs, symbols, and codes helps people interpret and draw meaning from images.