Spencer Silver (1941–2021)

He inadvertently created the adhesive that found a use in “repositionable pressure-sensitive adhesive sheet material” — aka the Post-it Note. The New York Times has an obituary.

OCA is big on Post-it Notes. I see eight partial pads on my desk as I’m typing.

Some Post-it Note posts
Disses, digital and analog : Jim Lehrer’s Post-it Notes : Post-it Note bird : Post-it Note history : Thelonious Monk : Twenty uses for a Post-it Note