Simplify the following text for a Grade 8 native English-speaking person.
Original: PEN originally stood for `` Poets , Essayists and Novelists '' , but now includes writers of any form of literature , such as journalists and historians .
Simplified: At first , he letters P , E , and N stood for `` Poets , Essayists and Novelists '' . Now the group includes any other kinds of writers , such as journalists and historians .