DIAS is a coaching institute located in Delhi, specializing in preparing students for the Civil Services Examination (CSE) and Indian Forest Service Examination. These prestigious exams are conducted by the Union Public Service Commission (UPSC).

DIAS Physics Notes (Vol. 1-8) by Vajpayee Sir is a comprehensive study resource for the Physics optional subject in the UPSC Mains Exam. These notes thoroughly cover the entire Physics optional syllabus, ensuring alignment with the UPSC guidelines.