The International Council of Graphic Design Associations (ICOGRADA) has been the professional world body for graphic design and visual communication since it was founded in London in 1963. A voluntary grouping of world-wide associations with a strong educational remit, it promotes the role of graphic design in both society and commerce. The ICOGRADA archive comprises 2000 posters from around the world, library holdings, and a significant body of documentation relating to governance, administration and educational activities.
See also news item and related blog entry about Icograda's 50th Anniversary Exhibition held at the London College of Communication 31 August - 13 September, 2013. You can also access the description of this archive on the Archives Hub.
All images above are from the Icograda poster collection.