 It was necessary to make the distinction between official transactions that were made with the main objective of promoting the economic and social development of developing countries, as opposed to other official flows (OOF) like military assistance.To that end, the committee adopted the concept of Official Development Assistance (ODA) in 1969.The DAC revised the definition in 1972, which has remained unchanged since then, except for changes in the list of recipients for which it can be counted.