Determiner: When "a few" modifies a noun, it acts as a determiner, specifying a small quantity.
* Example: "I have a few books on my shelf." (Here, "a few" modifies the noun "books").
Pronoun: When "a few" stands in for a noun, it acts as a pronoun.
* Example: "A few came to the party, but not many." (Here, "a few" refers to a group of people previously mentioned or understood).