
...but the FOUNDATION of gift-giving
is reciprocity.
The Big Bang Theory Season 2, Episode 11

the Gretchen and Elliott Schwartz
Foundation,
Breaking Bad Season 5, Episode 15

Hang on, let's talk about it. This is a
National Science Foundation expedition.
The Big Bang Theory Season 2, Episode 23

What sort of FOUNDATION do you have?
The Big Bang Theory Season 3, Episode 10

The National Science Foundation
The Big Bang Theory Season 7, Episode 6