C/o mailing address

A common abbreviation!

"C/o" is short for "care of", and it's often used in mailing addresses to indicate that the mail should be delivered to a specific person or department at a particular location.

For example:

In this example, the mail should be delivered to John Doe at the Smith & Co. office located at 123 Main St, Anytown, USA 12345.

The "c/o" notation is often used when the recipient's name is not the same as the company or organization, or when the recipient is not the primary occupant of the address. It's a way to ensure that the mail is delivered to the correct person or department.