Preparatory Committees for an Arms Trade Treaty
The Preparatory Committees for an Arms Trade Treaty, commonly known as PrepComs, were the United Nations developmental committees for the Arms Trade Treaty. There were 4 PrepComs from 2010 to 2012, all tasked with researching and preparing recommendations for the negotiation of the Arms Trade Treaty. They presented their final report to the UN Conference on the Arms Trade Treaty in July 2012. Background
Countries in the United Nations have long been concerned about the lack of a global normative framework for guiding and governing international arms transfers. After years of international campaigning from individuals and states, the United Nations General Assembly voted in 2006 to negotiate an Arms Trade Treaty. When delegates of the United Nations decided that they would negotiate an Arms Trade Treaty in 2012, there emerged a sentiment to host a series of preparatory conferences for member states and civil society to arrange and organize the eventual negotiations. In order to do this, four preparatory committees were scheduled. Sittings
Four PrepComs sat in the period before negotiations began in 2012. All four were chaired by Argentinian Ambassador Roberto García Moritán, and held in the United Nations Building in New York City. Outcomes 
The final report of the PrepComs was published on the 7th of March 2012, and presented to the Conference on the Arms Trade Treaty from the 2nd to 27th of July the same year. The Arms Trade Treaty was adopted by the General Assembly on the 2nd of April 2013 by a 154-to-3 vote, with 23 abstentions. It was opened for formal signature by all states in New York on 3 June 2013, and  entered into force on 24 December 2014, 90 days after the date of the 50th ratification. See Also
 Disarmament
 Mine action
 Small Arms and Light Weapons (SALW)

References 

Arms control
Organizations established by the United Nations