The Army's Military Occupational Specialty (MOS) is a system of categorizing career fiels. Related jobs are grouped together by Career Management Field (CMF) numbers. For example, 11 is the CMF for the infantry. Some CMFs group entire Army branches, while others contain miscellaneous jobs. The Army is currently restructuring the MOS designation to simplify the system. Most of these changes took place in 2004 but will continue into 2009. Changes already taken place include consolidating engineering into CMF 21, moving meds (enlisted) to CMF 68, and deletion & mergers of redundant jobs.