Central Government Organisations/Undertakings - O to R

Oil and Natural Gas Corporation(ONGC) http://www.ongcindia.com/
Oil India Limited http://oilindia.nic.in/
Ordinace Clothing Factory http://ocfs.gov.in/
Ordinace Factories Board http://ofbinida.com/
Overseas Construction Council of India http://projectexports.nic.in/
Paradeep Phosphate Limited http://www.paradeepphosphates.com/
Pawan Hans Helicopters Ltd. (PHHL) http://www.pawanhans.com/
Patent Facilitating Centre http://www.indianpatents.org/
Pharmacy Council of India http://pci.nic.in/
Power Finance Corporation http://www.pfcindia.com/
Powergrid Corporation of India http://www.powergridindia.com/
Power Trading Corporation of India http://www.ptcindia.com/
Public Enterprises Selection Board http://persmin.nic.in/pesb/
Pyrites, Phosphates and Chemicals Limited (PPCL) http://www.ppclindia.com/
Rail India Technical and Economic Services (RITES) http://www.rites.com/
Rashtriya Chemicals & Fertilizers Limited http://www.rcfltd.com/
Rastriya Sanskrit Samsthan http://www.sanskrit.nic.in/
Registrar of Newspapers of India http://rni.nic.in/
Rehabilitation Council of India http://www.seeq.com/popupwrapper.jsp?referrer=&domain=rehabcouncil.org
Research, Designs and Standards Organisation http://www.rdso.org/
Reserve Bank of India (RBI) (See Banks) 
Rural Electrification Corporation Ltd. http://rec.nic.in/