The document discusses film classification systems in the UK and US. In the UK, films are rated by the BBFC on a scale from U to 18 based on appropriate age and content. The current 5-level system was introduced in the 1980s. In the US, ratings include G, PG, PG-13, R and NC-17 based on parental guidance and appropriate age. The document also provides an example of the 2014 film Divergent, which received a 12A rating in the UK and PG-13 in the US due to its moderate violence and threat themes.