These are gadgets that first appeared in the original manga.
ADV Manga's Gadget Vol 1 Manga for only 5.99 at The Mage's
Waffletop
Design Your Own Anime and Manga Characters by TB Choi
JAPAN manga LOT: Mobile Suit Gundam: The Origin vol.1~24 Complete
Komi Can't Communicate Box Set Vols. 1-4 - Target Exclusive
Kagurabachi (Manga) - TV Tropes
Golgo 13 - Wikipedia
15+ BEST Anime Shows With Technology & Gadgets
Learn Japanese with Manga in 6 Simple Steps
Doraemon history: The manga and anime's best genre hits - Polygon
The History of Manga KCP International Japanese Language School
Attack on Titan Manga
Moe anthropomorphism - Wikipedia
Oshi no Ko (Manga) - TV Tropes