
- Where's your NOTEBOOK?
- Um, I don't have one.
The Big Bang Theory Season 3, Episode 10

Dreamily doodling
"Mrs. Leonard Hofstadter" in a NOTEBOOK?
The Big Bang Theory Season 4, Episode 9

Where's my NOTEBOOK?
My NOTEBOOK's gone. Oh, no.
The Big Bang Theory Season 10, Episode 20

Like all my underwear, that NOTEBOOK says,
"Property of Sheldon Cooper."
The Big Bang Theory Season 10, Episode 19

The NOTEBOOK isn't in the bathroom.
The Big Bang Theory Season 10, Episode 20