title: Three-level plan for Y2K helps break problem down into 'critical subsystems'.
mesh_terms: D002910:Chronology as Topic; D003199:Computer Systems / Q000592:standards*; D004636:Emergency Service, Hospital / Q000458:organization & administration*; D010934:Planning Techniques; D011340:Problem Solving; D013597:Systems Analysis; D013995:Time; D014481:United States