1, The full form of PSIS is Posterior Superior Iliac Spine. It’s used on Medical ,Anatomy & Physiology in Worldwide

Posterior Superior Iliac Spine (PSIS) is part of the human hip bone.

2, The full form of PSIS is Philippine Society for Industrial Security. It’s used on Associations & Organizations ,Professional Associations in Philippines

Philippine Society for Industrial Security (PSIS) is an organization of security professionals in the Philippines, whose members provide protection to the people, property, information, and assets of diverse private and public organizations.

3, The full form of PSIS is Persatuan Sepakbola Indonesia Semarang,[Indonesian Football Association Semarang]. It’s used on Associations & Organizations ,Sports & Recreation Organizations in Indonesia

Persatuan Sepakbola Indonesia Semarang (PSIS) is an football club based in Semarang, Central Java, Indonesian.

4, The full form of PSIS is Preparatory School for International Students. It’s used on Academic & Science ,Universities & Institutions in Ukraine

Preparatory School for International Students (PSIS), also known as Ivan Franko National University of Lviv, is the oldest university in Ukraine, established in 1661. The University was renamed for the great national Ukrainian writer, poet, and statesman, Ivan Franko (1856-1916).