Literature, as an art form, can also include works in various non-fiction genres, such as biography, diaries, memoir, letters, and the essay. Within its broad definition, literature includes non-fictional books, articles or other printed information on a particular subject.
Etymologically, the term derives from Latin literatura/litteratura "learning, a writing, grammar," originally "writing formed with letters," from litera/littera "letter". In spite of this, the term has also been applied to spoken or sung texts. Developments in print technology have allowed an ever-growing distribution and proliferation of written works, which now includes electronic literature.
Literature is classified according to whether it is poetry, prose or drama, and such works are categorized according to historical periods, or their adherence to certain aesthetic features, or genre.
