ETV-BIF - (Enhanced Television-Binary Interchange Format) - Enhanced Television-Binary Interchange Format is a CableLabs specification for delivering interactive TV applications to older cable provider's set-top boxes as well as newer entry-level boxes that can't operate using cable's primary specification for interactive TV, Tru2way. ETV-BIF is based on a simpler binary language. After software is added to these less sophisticated set-top boxes, it can provide many interactive TV applications.