Until recently, naturalists divided primates into prosimians (lemurs, lorises and tarsiers) and simians (monkeys, apes and human beings). Today, though, the accepted split is between "strepsirrhini" (wet-nosed) and "haplorhini" (dry-nosed) primates; the former includes all the non-tarsier promisimians, and the latter consists of tarsiers and simians. Simians themselves are divided into two major groups: old world monkeys and apes ("catarrhines," meaning "narrow-nosed") and new world monkeys ("platyrhines," meaning "flat-nosed").
Technically, then, all human beings are haplorhine cattarrhines, dry-nosed, narrow-nosed primates. Confused yet?