product introduction: the introduction (usually by an advertising campaign) of a new product or product line
introduction: the act of beginning something new
superclass myriapoda: used in some classifications to encompass the millipedes (Diplopoda) and centipedes (Chilopoda); formerly a large taxon including also the Pauropoda and Symphyla; the term Myriapoda now usually used synonymously with Diplopoda and limited to the millipedes