What is the social security number and work card in the United States? Is there a difference between the two?

Just kidding, how can the social security number be a work card, and international students will also have a social security number. I have American citizenship, social security number and no work card.

The social security number is equivalent to the American ID number. The first thing to do after immigrating to the United States is to apply for a social security number, which is necessary for both Americans and immigrants.

Work permit, as its name implies, is used for legal work, but if you are an American and a permanent resident (green card holder), you don't need to apply for a work permit.

The first thing to do after immigrating to the United States is to apply for a social security number. If the green card has been submitted but has not been approved or received, you must apply for a work card immediately in order to work legally.