Terrific BBC series on ordinary machines, and the ways they've changed over time. It's got a real diy feel, full of hand-made examples and hands-on explanations.

The creator, Tim Hunkin, has uploaded remastered versions with commentary postscripts.

Tim has also made a follow-up series on his Youtube channel called The Secret Life of Components.

※ TH = Order on Tim Hunkin's website. tmdb and imdb also uses this, and user says it's based on aired-order they found in TV guides¹⁾.
※ DB = Database Order. tvdb, and Wikipedia use this. Not sure where this info. comes from. Might be a bit of a circle jerk of references.
※ EXP = Order based on the webmaster's page on the Exploratorium website. First two seasons are out of wack, but the third is almost fine.

• The Secret Life of Machines
• https://www.timhunkin.com/a243_Secret-Life-of-Machines-intro.htm
• https://www.themoviedb.org/tv/34712-the-secret-life-of-machines
• https://thetvdb.com/series/the-secret-life-of-machines
• https://www.imdb.com/title/tt0431571
• Companion cartoons: https://www.secretlifeofmachines.com/