APG Germany - Account Planning Group (Germany)
http://www.apgd.de

APG Norway
http://www.apgnorway.no/

APG Romania
http://www.apgromania.ro/    

APG Spain - go to our international section or link through from here

APGUS - Account Planning Group (USA) -activities now being organised by
the AAAA - American Association of Advertising Agencies  http://www.aaaa.org

AA - The Advertising Association (UK)  http://www.adassoc.org.uk

AAAA - American Association of Advertising Agencies (USA)  http://www.aaaa.org

APG Australia - http://www.accountplanninggroup.com.au 

AQR: The Association for Qualitative Research  http://www.aqr.org.uk

ARF - Advertising Research Foundation (USA)  www.arfsite.org

ASA - Advertising Standards Authority (UK)http://www.asa.org.uk

BIG Conference (for the business-to-business market research sector)
http://www.Bigconference.org

CAP - The Committee of Advertising Practice (UK)  http://www.cap.org.uk

CIM - The Chartered Institute of Marketing (UK) http://www.cim.co.uk

HAT - History of Advertising Trust (UK)
http://www.hatads.org.uk

IAA - International Advertising Association UK Chapter
http://www.iaauk.com

Independent Consultants Group - over 250 individual consultants/small consultances http://www.indepconsultants.org

IPA - Institute of Practitioners in Advertising (UK)
http://www.ipa.co.uk

ISBA - Incorporated Society of British Advertisers (UK)
http://www.isba.org.uk

LBEA - Live Brand Experience Association
http://www.lbea.org.uk

MRS - The Market Research Society (UK)
http://www.marketresearch.org.uk

NABS - the marketing communications industry's charity (UK)
http://www.nabs.org.uk

Newspaper Marketing Agency
http://www.nmauk.co.uk

Royal Mail Infobank - Drop in centre for media and marketing information http://www.royalmail.com/advertising

Thinkbox (television marketing body for UK commercial broadcasters)   http://www.thinkbox.tv

WARC - World Advertising Research Center (UK)  http://www.warc.com