1️⃣ Book List with Title and Author
• Engineering Mathematics — B.S. Grewal
https://www.amazon.in/
• Materials Science and Engineering — V. Raghavan
https://www.amazon.in/
• Mechanical Engineering Objective — R.K. Jain
https://www.amazon.in/
• Electrical Engineering Fundamentals — V.K. Mehta
https://www.amazon.in/
• Computer Science Engineering Guide — Arihant Experts
https://www.amazon.in/
• Biotechnology Fundamentals — P.K. Gupta
https://www.amazon.in/
• Research Methodology — C.R. Kothari
https://www.amazon.in/
2️⃣ Official PDF / Syllabus URL
• Official DRDO Website
https://www.drdo.gov.in/
• DRDO Internship Notification PDF
https://drdo.gov.in/drdo/sites/default/files/vacancy/advtNMRL22052026.pdf
• DRDO Careers Portal
https://www.drdo.gov.in/careers
3️⃣ Best Websites / Tutorials Links
• NPTEL Engineering Courses
https://nptel.ac.in/course.html
• DRDO Research Information
https://www.drdo.gov.in/labs-and-establishments
• Engineering Tutorials
https://www.tutorialspoint.com/
• Technical Interview Preparation
https://www.indiabix.com/
• Research Methodology Tutorials
https://research-methodology.net/
4️⃣ YouTube / Video Course URLs
• DRDO Internship Preparation
https://www.youtube.com/results?search_query=DRDO+Internship+Preparation
• Mechanical Engineering Lectures
https://www.youtube.com/results?search_query=Mechanical+Engineering+Lectures
• Electrical Engineering Classes
https://www.youtube.com/results?search_query=Electrical+Engineering+Classes
• Computer Science Technical Classes
https://www.youtube.com/results?search_query=Computer+Science+Engineering+Lectures
• Research Methodology Lectures
https://www.youtube.com/results?search_query=Research+Methodology+Lectures