1. The use of the telephone as an interactive medium for promotion and sales
   - telemarketing, telecommerce

Type of: marketing, merchandising, selling

• diagonal matrix
• diagonalisable
• diagonalisation
• diagonalise
• diagonalizable
• diagonalization
• diagonalize
• diagonally
• diagram
• diagrammatic
• diagrammatical
• diagrammatically
• diagramming
• diagraph
• diakinesis
• dial
• dial phone
• dial telephone
• dial tone
• dial-up
• dialect
• dialect atlas
• dialect geography
• dialectal
• dialectic