The 3M Sound On Slide system was launched in 1969 and enabled anyone to assemble and play multimedia presentations with each photo accompanied by 30 seconds of audio. -------------- SUBSCRIBE ----------------- null ------------ Merchandise ---------------- https://teespring.com/stores/techmoan-merch ------------ SUPPORT -------------- This channel can be supported through Patreon https://www.patreon.com/techmoan ******Patrons usually have early access to videos****** ' --------- Outro Music ---------- Over Time - Vibe Tracks https://www.youtube.com/watch?v=VSSswVZSgJw ----- Outro Sound Effect ----- ThatSFXGuy - https://www.youtube.com/watch?v=5M3-ZV5-QDM ----- AFFILIATED LINKS/ADVERTISING NOTICE ------ All links are Affiliated where possible. When you click on links to various merchants posted here and make a purchase, this can result in me earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network & Amazon. I am a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to AMAZON Sites (including, but not limited to Amazon US/UK/DE/ES/FR/NL/IT/CAN) FAQ Q) Why are there comments from a week ago when this video has just gone live today? A) Patrons usually have early access to videos. I'll show the first version of a video on Patreon and often the feedback I get results in a video going through further revisions to improve it. e.g. Fix audio issues, clarify points, add extra footage or cut extraneous things out. The video that goes live on youtube is the final version.