Apes are the members of the Hominoidea superfamily of primates, which includes humans. Under the current classification system there are two families of hominoids:
the family Hylobatidae consists of 4 genera and 13 species of gibbons, including the Lar Gibbon and the Siamang, collectively known as the "lesser apes"
the family Hominidae consisting of orangutans, gorillas, chimpanzees, and humans, collectively known as the "great apes".
A few other primates, such as the Barbary Ape, have the word "ape" in their common names (usually to indicate lack of a tail), but they are not regarded as true apes.Except for gorillas and most humans, all true apes are agile climbers of trees. They are best described as omnivorous, their diet consisting of fruit, grass seeds, and in most cases some quantities of meat and invertebrates—either hunted or scavenged—along with anything else available and easily digested. They are native to Africa and Asia, although humans have spread to all pa
Source:
http://en.wikipedia.org/wiki/A.P.E.