Evilspeak (1981)

The clumsy military cadet Stanley Coopersmith is orphan and completely outcast in the West Andover Academy. He is frequently abused and humiliated by four despicable mates, and has a bad treatment from his teachers, the coach, the colonel and even from the local reverend. When Coopersmith finds a book of black mass that belonged to the evil medieval Father Esteban, he uses a computer to conjure Satan and revenge his harassers.