cards, index cards
Durante la época navideña, se envían muchas tarjetas o felicitaciones navideñas.
During the Christmas season, many Christmas cards or greetings are sent.
No cuesta mucho hacerse tarjetas.
It doesn't cost much to make business cards.
— Les invasions barbares (2003)
¿Cuántas tarjetas ha sacado el árbitro en este partido?
How many cards has the referee shown in this match?