A bootable business card (BBC) is a CD-ROM that has been cut, pressed, or molded to the size and shape of a business card (designed to fit in a wallet or pocket). Alternative names for this form factor include "credit card," "hockey rink," and "wallet-size". The cards are designed to hold about 50 MB. The CD-ROM business cards are generally used for commercial product demos, are mailed to prospective customers, and are given away at trade shows.