Finger Monkeys

. Family Hylobatidae: gibbons ("lesser apes") (13 species)
. Family Hominidae: great apes including humans (7 species)
Note that the smallest grouping that contains them all is the Simiiformes, the simians, which also contains the apes. Calling apes "monkeys" is considered scientifically incorrect as apes are distinctly defined as different from monkeys. Apes were included in earlier use of the term, predating modern classifications. Including some or all apes (other than humans) remained the common usage in the early 20th century and is still in colloquial use. Calling either a simian is correct.