COMPANIES IN THIS INDUSTRY

ACLA – ACLARA BIOSCIENCES INC
ADES – Advanced Emissions Solutions, Inc.
AQUA – Evoqua Water Technologies Corp.
AVNA – ADVANCE NANOTECH, INC.
BHAG – BHA GROUP INC
BHTG – BIOHITECH GLOBAL, INC.
BRTL1 – BRISTOL RETAIL SOLUTIONS INC
CDTI – Clean Diesel Technologies, Inc.
CECE – CECO Environmental Corp.
CETX – Cemtrex Inc.
CLIR – ClearSign Combustion Corporation
CLWT – Euro Tech Holdings Company Limited
DANKY – DANKA BUSINESS SYSTEMS PLC
EECPQ – ENVIRONMENTAL ELEMENTS CORP
ELTTY – ELSTER GROUP SE (Foreign)
ERII – Energy Recovery, Inc.
ESCI – EARTH SCIENCES INC
FLDR1 – FLANDERS CORP
FLXT – FLEXPOINT SENSOR SYSTEMS INC
FSH – FISHER SCIENTIFIC INTERNATIONAL INC
FSS – Federal Signal Corporation
FTEK – Fuel Tech, Inc.
GISX – GLOBAL IMAGING SYSTEMS INC
GSCI – GEOSCIENCE CORP
HCCI – Heritage-Crystal Clean, Inc.
IFTI – IONIC FUEL TECHNOLOGY INC
IGI1 – IMAGISTICS INTERNATIONAL INC
IGTI – IMAGE GUIDED TECHNOLOGIES INC
IMSCQ – SECURE POINT TECHNOLOGIES INC
ISN – INSTRON CORP
JMAR – JMAR TECHNOLOGIES INC
KNWN – KNOW LABS, INC.
LDR – LANDAUER INC
LIQT – LiqTech International, Inc.
LR – LANIER WORLDWIDE INC
MCSI – MCSI INC
MEAS – MEASUREMENT SPECIALTIES INC
MKRS – MIKROS SYSTEMS CORP
MKTY – MECHANICAL TECHNOLOGY INC
MOCO – MOCON INC
MPR – MET PRO CORP
MTSXY – METAL STORM LTD (Foreign)
ONX – ONIX SYSTEMS INC
PFFVF – PFEIFFER VACUUM TECHNOLOGY AG (Foreign)
POLY – PLANET POLYMER TECHNOLOGIES INC
PPIH – Perma-Pipe International Holdings, Inc.
PROI – PROTERION CORP
PSRC1 – PRIMESOURCE CORP
RAE – RAE SYSTEMS INC
SODK – SODAK GAMING INC
SQNM – SEQUENOM INC
SRMC – SIERRA MONITOR CORP
STRN – SUTRON CORP
STST – ARGON ST, INC.
THI1 – THERMO INSTRUMENT SYSTEMS INC
TRON1 – TRION INC
VPF – VALPEY FISHER CORP
VWR – VWR CORP
VWRX – VWR SCIENTIFIC PRODUCTS CORP
WPIC – WPI GROUP INC
WTTR – Select Energy Services, Inc.
XGEN – XENOGEN CORP