COMPANIES IN THIS INDUSTRY

ACLS – Axcelis Technologies, Inc.
ACMR – ACM Research, Inc.
ACTRQ – ACTERNA CORP
ADAX – APPLIED DIGITAL ACCESS INC
ADEP – ADEPT TECHNOLOGY INC
ADEX – ADE CORP
ADZA – ADEZA BIOMEDICAL CORP
AEHR – Aehr Test Systems
AIXG – AIXTRON SE (Foreign)
AMAT – Applied Materials, Inc.
AMBA – Ambarella, Inc.
ASEC – ASECO CORP
ASMIY – ASM INTERNATIONAL N V (Foreign)
ASML – ASML Holding N.V.
ASTX1 – APPLIED SCIENCE & TECHNOLOGY INC
ASYS – Amtech Systems, Inc.
ASYT – ASYST TECHNOLOGIES INC
ATOM – Atomera Incorporated
AXTI – AXT Inc
BRKS – Brooks Automation, Inc.
BTUI – BTU INTERNATIONAL INC
CAMT – Camtek Ltd.
CATZ – COMPUTER ACCESS TECHNOLOGY CORP
CFMT – CFM TECHNOLOGIES INC
CMOS – CREDENCE SYSTEMS CORP
COHU – Cohu, Inc.
CPAK – CPAC INC
CSCD – CASCADE MICROTECH INC
CYMI – CYMER INC
DADE – DADE BEHRING HOLDINGS INC
DATM – DATUM INC
DPMI – DUPONT PHOTOMASKS INC
DQ – DAQO New Energy Corp.
DTIIQ – DT INDUSTRIES INC
DTMC – DTM CORP
EGLS – ELECTROGLAS INC
EGLT1 – EAGLE TEST SYSTEMS, INC.
EMAN – eMagin Corporation
ENPH – Enphase Energy, Inc.
ENTG – Entegris, Inc.
ETEC1 – ETEC SYSTEMS INC
EVTN – ENVIRO TECHNOLOGIES, INC.
FARL – FARREL CORP
FSII – FSI INTERNATIONAL INC
GEN2 – GENRAD INC
GGNS – GENUS INC
GIGA – GIGA TRONICS INC
GLGI – GREYSTONE LOGISTICS, INC.
GRB – GERBER SCIENTIFIC INC
GSNX – GASONICS INTERNATIONAL CORP
HELX – HELIX TECHNOLOGY CORP
HIRI – HI RISE RECYCLING SYSTEMS INC
ICHR – Ichor Holdings
IFRS – IFR SYSTEMS INC
IMI – Intermolecular, Inc.
IMSC – INTEGRATED MEASUREMENT SYSTEMS INC
ION1 – IONICS INC
IPGP – IPG Photonics Corporation
ISOOQ – ISCO INTERNATIONAL INC
ITC1 – INTELLIGENT CONTROLS INC
IVISF – ICOS VISION SYSTEMS CORP N V (Foreign)
KATY – KATY INDUSTRIES INC
KEI – KEITHLEY INSTRUMENTS INC
KLAC – KLA-Tencor Corporation
KLIC – Kulicke and Soffa Industries, Inc.
LCRY – LECROY CORP
LRCX – Lam Research Corporation
MCTI – MCT INC
MTCH1 – NORTEM, N.V.
MTSN – MATTSON TECHNOLOGY INC
MTST1 – MICROTEST INC
MZIAQ – MILACRON INC
NANO – Nanometrics Incorporated
NEXT1 – NEXTEST SYSTEMS CORP
NPTT – NPTEST HOLDING CORP
NVLS1 – NOVELLUS SYSTEMS INC
NVMI – Nova Measuring Instruments Ltd.
OLED – Universal Display Corporation
PHTN – PHOTON DYNAMICS INC
PKE – Park Electrochemical Corporation
PLAB – Photronics, Inc.
PRIA – PRI AUTOMATION INC
PRTKQ – PROFILE TECHNOLOGIES INC
PTIS – PLASMA THERM INC
QSYS – QUAD SYSTEMS CORP
QUIP – QUIPP INC
RBCN – Rubicon Technology, Inc.
SCON – Superconductor Technologies Inc.
SFAM – SPEEDFAM IPEC INC
SMTL – SEMITOOL INC
STCO1 – SIGNAL TECHNOLOGY CORP
SVGI – SILICON VALLEY GROUP INC
TEK – TEKTRONIX INC
TER – Teradyne, Inc.
TGX – THERAGENICS CORP
THS1 – THERMOSPECTRA CORP
TNSU – TANISYS TECHNOLOGY INC
TRKN – TRIKON TECHNOLOGIES INC
TRT – Trio-Tech International
TVL1 – THERMO VOLTEK CORP
UCTT – Ultra Clean Holdings, Inc.
UTEK – ULTRATECH INC
VECO – Veeco Instruments Inc.
VSEA – VARIAN SEMICONDUCTOR EQUIPMENT ASSOCIATES INC
WJ – WJ COMMUNICATIONS INC
WJ1 – WATKINS JOHNSON CO
WJCI – WJ COMMUNICATIONS INC
XCRA – Xcerra Corporation
XPER – Xperi Corporation
XXIA – IXIA
YILD – YIELDUP INTERNATIONAL CORP