Source: http://www.megalextoria.com/wordpress/index.php/2017/03/21/computer-palace-atari-400800/
This is an advertisement for a computer mail order place called Computer Palace that specialized in software for Atari 8-bit computers. It comes from Volume 1, Number 2 of ROM magazine which was a short lived Atari 400/800 specific magazine.
Read more: http://www.megalextoria.com/wordpress/index.php/2017/03/21/computer-palace-atari-400800/
