Digital 21

Digital 21 is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Audio Visual Equip, Supplies & Parts

North American Industry Classification System (NAICS) Categories:

• Radio, Television, And Other Electronics Stores > Audio Equipment > Audio Visual Dealers

Standard Industry Classification (SIC) Categories:

• Radio, Television, And Consumer Electronics Stores > Audio Equipment > Audio Visual Dealers