Unmarked modems, graphics cards, drive interface cards and other devices often require drivers to function. Even though the hardware may be old, it may still have a useful purpose - if the proper driver can be found. Many of these cards have cryptic labels but nothing obvious about who made it.

However, if there is an FCC ID on it, you may be able to get the additional mileage from the device.

The FCC ID is a unique code that identifies the manufacturer and the part. The FCC website has a section to look up ID numbers.

Go to the FCC identification database at http://www.fcc.gov/oet/ea/. The minimum information needed is the Grantee Code, which identifies the manufacturer in the first three characters of the code. The product code can also be entered to find the specific product.

The information that is returned will tell you a great deal about the product including its age. Once the manufacturer is known, chances are that you will be able to locate the necessary driver through a Web search or by inquiring in a users' forum.