National Service refers to conscription in Singapore. It is compulsory for all able-bodied males to be enlisted in the Singapore Armed Forces (SAF) when they are 18 years old for 2 to 2.5 years as full-time National Servicemen. After the completion of full-time National Service, they are required to serve as Operationally Ready National Servicemen. This entails being recalled from work or study for a few weeks of training every year.