HBO (Warning/Copyright Screens)

Background
In 1981, briefly displayed a copyright warning screen at the end of their broadcast day. This practice ended on December 28, 1981, when HBO completed its transition to 24-hour broadcasting to compete with rival network Showtime.

(1981)
Warning: On a medium dark shade blue background, the following copyright warning appears in a small white Helvetica font with a black shadow:

THE HOME BOX OFFICE PAY TELEVISION SERVICE IS A PRODUCTION OF HOME BOX OFFICE, INC. © 1981 '''Home Box Office, Inc. All Rights Reserved. No part of the service may be reproduced or transmitted in any form without the written permission of Home Box Office, Inc.'''

Technique: None.

Music/Sounds: None.

Availability: Only seen at the very end of the channel's sign-off throughout 1981.