The General Assembly has held three Special Sessions devoted to Disarmament (SSOD). There was SSOD-I in 1978, SSOD-II in 1982 and SSOD-III in 1988 (see links below). Only SSOD-I succeeded in producing a final document.
Since 1995, the General Assembly has been calling for a fourth session on disarmament. It then established a Working Group in 2003 to discuss the agenda and the possibility of establishing a preparatory committee for a fourth special session of the General Assembly devoted to disarmament (SSOD-IV).
By resolution A/61/60, in 2007 the General Assembly established an Open-Ended Working Group on SSOD-IV to consider the objectives and agenda, including the possible establishment of the preparatory committee, for an SSOD-IV.
The Open-Ended Working Group met from 25 to 29 June 2007, from 30 July to 3 August 2007 and from 27 to 31 August 2007 under the Chairmanship of Ambassador Alfredo Labbé of Chile.