National Housing Development Authority
Website: http://www.nhda.lk
National institute for Marketing in Sri Lanka
Website: http://www.slim.lk
Nuwara Eliya Agricultural Cooperative Society Ltd.
Website: http://www.agco.lk
Old Anandian's Association - Chilaw
Website: http://www.oaac.lk
Organisation of Professional Association of Sri Lanka (OPA)
Website: http://www.opasrilanka.org
Pacific Association of Quantity Surveyors (PAQS)
Website: http://www.paqs.net
Pharmaceutical Society of Sri Lanka
Website: http://www.psslnet.org
Photographic Society of Sri Lanka
Website: http://www.pssl.lk
Planters Association of Ceylon
Website: http://www.
Population Association of Sri Lanka (PASL)
Website: http://www.nsf.ac.lk/pasl/
Protected Agriculture Entrepreneurs' Association
Website: http://www.paea-lk.org
Radio Society of Sri Lanka
Website: http://www.rssl.lk