1) Military rank of Germany 
PIONIER is the Polish national research and education network created to provide high-speed Internet access and to conduct network-based research. Most of the government founded higher education organisations and all of metropolitan area networks in Poland are connected to the PIONIER network, and are members of the PIONIER Consortium. The previou...[VLTI] The Precision Integrated-Optics Near-infrared Imaging ExpeRiment (PIONIER) is an instrument for the VLTI astronomical observatory. It combines the light from four telescopes simultaneously and provide the equivalent angular resolution of a 100 m telescope. PIONIER has been built at LAOG and has been installed at VLTI in November 2010...
Pionier is a cultivated variety of potato.
(pl. Pioniere) combat engineer.