Determiners are words placed before nouns that qualify or limit their meaning. There are several types of determiners including articles, possessives, demonstratives, indefinite adjectives, and other determiners. Articles include the indefinite articles "a" and "an" which are used before consonants and vowel sounds respectively, as well as the definite article "the". Possessives such as "my" and "our" point out who owns an object. Demonstratives like "this" and "that" are used to point out objects or people. Indefinite articles describe quantity and other determiners include ordinals, numerals, and words like "few" and "each".