
You should see
the Valentine's Day CARD he gave me.
The Big Bang Theory Season 9, Episode 18

HOWARD:
Wait, is this your CARD or isn't it?
The Big Bang Theory Season 2, Episode 20

Remember your CARD, put it back.
The Big Bang Theory Season 4, Episode 18

Trust me, this was their CARD.
The Big Bang Theory Season 2, Episode 20

Now do you remember your CARD?
The Big Bang Theory Season 4, Episode 18