TL;DR: COMSATS University Islamabad (also known as CUI / COMSATS) is a Public university located in Islamabad, Federal. It is recognized by HEC and offers admissions based on merit, evaluated using entrance tests like NAT-IE, NAT-IM, NAT-ICS.COMSATS University is a leading public sector university with multiple campuses. Merit is calculated based on Matric (10%), FSc (40%), and NTS-NAT (50%). Some programs accept direct admission on FSc basis.