I was looking through my various Laser disc while moving them around and noticed how some of the technology evloved. So I was wondering what the first 1: disc to be released. 2: CLV disc 3: disc with PCM audio 4: commentary 5: A still gallery (on set photo's, scripts, storyboards, etc) 6: Anamorphic widescreen (one of the promo Warner Bros Disc) 7: OAR 8: Matrix encoded PCM? 9: Programable TOC for "alternate angle" 10: Hi-Vision Disc 11: MUSE Hi-Vision Disc 12: CDV 13: LD-G I "think" I know first for AC-3 is the Dolby Stereo Digital Test disc. Clear and Present Danger for movie. DTS Jurasic Park... Then I was thinking that the last disc manufactured... Arcade Dragion Lair, Movie Tokyo Raider. What was the last AC-3 disc made in the US before they decided to drop AC-3? Then I was thinking silly thing like when did the "poor upside down turtle" first come about?