ABB LTD.

BHARAT HEAVY ELECTRICAL LTD. (BHEL)

BHARAT HEAVY PLATE & VESSELS LTD. (BHPV)

BHARAT PETROLEUM CORPORATION LIMITED (BPCL)

BHARAT OMAN REFINERIES LIMITED (BORL)

BRIDGE & ROOF CO. (INDIA) LTD (B & R)

BPCL KOCHI REFINERY

BHARAT SANCHAR NIGAM LTD. (BSNL)

BONGAIGAON REFINERY & PETROCHEMICALS LTD. (BRPL)

CENTRAL GROUND WATER BOARD (CGWB)

CHENNAI PETROLEUM CORPORATION LTD. (CPCL)

DIRECTOR GENERAL OF SUPPLIES & DISPOSALS (DGD &D)

ENGINEERS INDIA LIMITED (EIL)

ESSAR GROUP

GUJRAT WATER SUPPLY & SEWERAGE BOARD (GWSSB)

GAS AUTHORITY OF INDIA LIMITED (GAIL)

GUJRAT GAS CO. LTD. (GGCL)

HINDUSTAN ZINC LTD. (HZL)

HINDUSTAN COPPER LIMITED

HPCL MITTAL ENERGY LTD. (HMEL)

HINDUSTAN PETROLEUM CORPORATION LTD. (HPCL)

INDIAN OIL CORPORATION LIMITED (IOCL)

IPGCL, NEW DELHI

I & PH SHIMLA (IPH)

INDIAN RAILWAYS & DELHI METRO RAILWAYS (DMRC)

INDRAPRASTHA GAS LIMITED

INDIA OIL TANKING LRD. (IOTL)

LARSEN & TURBO LTD. (L & T)

MAHANADI COALFIELDS LTD (MCL)

MANGLORE REFINERY & PETROCHEMICAL LTD. (MRPL)

NATIONAL THERMAL POWER CORPORATION LIMITED (NTPC LTD.)

NATIONAL FERTILIZERS LTD. (NFL)

NATIONAL ALUMINUM CO. LTD. (NALCO)

NEYVELI LIGNITE CORPORATION LTD. (NLC)

NAFTOGAZ INDIA LTD.

NORTHERN COAL FIELDS LTD (NCL)

OIL & NATURAL GAS CORPORATION LTD. (ONGC)

OIL INDIA LTD., DULIAJAN (OIL)

PUNJ LLOYDS LTD.

RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LTD. (RRVUNL)

RELIENCE

RAJASTHAN STATE MINES & MINERALS LTD. (RSMM)

SAHARA INDIA

TOYO ENGENEERING CORPORATION

TELECOM FACTORY JABALPUR

TEHRI HYDRO DEVELOPMENT CORPORATION (THDC)

STEEL AUTHORITY OF INDIA LIMITED (SAIL) (A) ROUERKELA (B) BOKARO (C) BHILAI