How can I use an old keyboard with my computer?

Episode 1744 (12:09)

John from California
USB to PS2 Adapter

John calls in to talk about how you can get a USB to PS2 adapter for your old keyboard and computer if yours doesn't have a USB port. Leo says that if you are still using a computer that doesn't support USB keyboards, this is a good way to do so. However most, if not all, computers support USB in some form and way.