Answer:

1. Philippine Army (PA) - The Philippine Army is the main branch of the Armed Forces of the Philippines responsible for ground warfare. Its role is to defend the Philippines against external and internal threats, maintain peace and security, and support civil authorities in times of national emergencies.

2. Philippine Air Force (PAF) - The Philippine Air Force is the aerial warfare service branch of the Armed Forces of the Philippines. Its responsibility is to provide air defense and air support to ground and naval forces, participate in humanitarian and disaster relief operations, and enforce Philippine sovereignty.

3. Philippine Navy (PN) - The Philippine Navy is the naval warfare service branch of the Armed Forces of the Philippines. Its responsibility is to defend the country's coastal and offshore territories, protect its maritime resources, and support other branches of the military in joint operations.

4. Philippine National Police (PNP) - The Philippine National Police is the main law enforcement agency of the Philippines. Its responsibility is to enforce the law and maintain peace and order, protect life and property, prevent and detect crimes, and perform other police functions.