General Terms of Use Policy: The AOCD web site and AOCD apps contain copyrighted material and other proprietary information, which may include, but is not limited to: text, software, photos, video, graphics and audio. It is not permitted to modify, publish, transmit, participate in the transfer or sale, create derivative works, or in any way exploit any of the content, in whole or in part. The AOCD limits permission for downloading education material for personal use only.