The document outlines the different rating categories for films and videos in the UK. It describes the intended audiences and defines the types of content suitable for each rating category, from "U" which is suitable for all ages, to "PG" which may have some scenes unsuitable for young children, to "12A", "12", and "15" which are restricted to older age groups, to "18" which is restricted to adults. It also defines the "R18" category which is only for explicit adult content and can only be shown in licensed venues for adults.