What inventions found a use far from their original purposes?

 

What inventions found a use far from their original purposes?

“Duct” tape (originally developed for ducts) and WD40 (without any reputable citeable source) originally developed for the maintenance of the components of nuclear weapons.

Bonus point for cable ties.

Originally developed for tying cables.

Thx4theA2A

Oa"d; What inventions found a use far from their original purposes?