Lung cancer is the most common cause of clubbing. Clubbing often occurs in heart and lung diseases that reduce the amount of oxygen in the blood. These may include: 1  Heart defects that are present at birth (congenital).
What is a safety management system (SMS)? A safety management system is a systematic approach to managing safety, including organisational structures, accountabilities, policies and procedures.
Safety instrumented system - See also. 1  Distributed control system, (DCS). 2  Industrial control systems, (ICS). 3  Industrial safety systems. 4  Spurious trip level. 5  Safety integrity level, (SIL).