The evolution of the business card

A business card CD is an interesting evolution of the business card. Recent technological advances have made CD-ROM "business cards" possible which can hold about 35 to 100 MB of data. These cards may be square, round or oblong but are approximately the same size as a conventional business card. CD business cards are designed to fit within the 80 mm tray of a computer's CD-ROM drive. They are playable in most computer CD drives, however do not work in slot-loading drives. Despite the ability to include dynamic presentations and a great deal of data, these discs are not in common use as business cards.

Most handheld computers have the ability to "beam" (send through infra-red or Bluetooth communication) an electronic business card, eliminating the need for the recipient to re-key the contact information. This is also done via SMS on most mobile telephones.
There are also specialty business cards that are made from plastic (PVC), metal, cloth, magnets and even real wood. For the most part, these special material business cards are the same size as standard but typically are rounded on the corners / edges. Although paper business cards are by far the most used, these "other" material cards are popular amongst companies that require a unique look.

You could even get your business card CD printed.
A CD/DVD printing company would offer a four colour process and pantone spot colour screen-printing onto blank CDs, DVDs, mini CDs and Business Card CDs. The process is working as follow: they would print directly onto the face of the disc to match your company brand and other marketing collateral. You would be then free to burn your chosen content onto your CD-Rs at your leisure or leave it to another company doing CD and DVD duplication or CD/DVD replication. They can usually duplicate up to 20,000 DVD-Rs and 40,000 CD-Rs a day.