Here are the Course Resources : 

1. DBMS Course Resources Link for Indian Students ( UPI )   : https://studigoo.com/product/rdbms-part-1-hd-course-notes-lecture-slides-bonus-reading-material-workbook-to-practice/

2. DBMS Course Resources Link for Students Out of India : https://payhip.com/b/36tLp
   
   
   The complete DBMS material package includes a ZIP file (85 MB), multiple PDFs (totaling ~16 MB), PowerPoint slides (66 MB), and HTML resources (~13 MB). Altogether, the total size is approximately 180 MB, neatly organized and ready for structured learning.

For Operating System Course Published at FCC : https://youtu.be/yK1uBHPdp30

1. 
   OS Course Resource Link for Indian Students ( UPI ) : https://studigoo.com/product/finest-operating-system-complete-notes-400-pages-hd-pdf-gate-cse-2/

2.  
   OS Course Resource Link for Students Out of India : https://payhip.com/b/KhCOd