This document provides information and rules about using adjectives as nouns to describe groups of people and nationalities. It explains that adjectives like "the rich" and "the poor" are used to describe specific groups. Nationality adjectives ending in -sh, -ch, -ss, and -ese can be used with "the" to refer to nationalities, while words ending in -an and a few others can be used with or without "the" but take an "s" to refer to the people. There are some nationalities that have a different noun form than the adjective like Polish/Pole or Scottish/Scot. The document also provides the standard order of adjectives.