This document provides definitions and explanations for common signs and warnings. It discusses signs related to machines being out of order, hotels being fully booked, events or products being sold out, traffic and transportation directions to keep right or left, safety instructions to fasten seatbelts or mind steps, and prohibitions against disturbing rooms, feeding animals, entering areas, or parking in certain places. Cautions are given regarding dangers, gaps, and low overhead clearances. The purpose is to explain the meanings of frequently encountered instructions and notifications.