Serial Port Adapter How Can I Add A USB Adapter To An Old Laptop That Has No USB Port?

How can I add a USB adapter to an old laptop that has no USB port? - serial port adapter

I see many USB to serial there, but it seems he had the ability to serial port via a USB port on your PC and not vice versa, I need. Is there a way to USB capability to older laptop add an adapter to another USB port? Thank you.