diff --git a/src/WikiSyllabus/KTU/2019_Scheme/S4/CSE/CST206/SUMMARY.md b/src/WikiSyllabus/KTU/2019_Scheme/S4/CSE/CST206/SUMMARY.md
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+# CST 206  - Operating Systems
+
+#### INDEX
+
+### Module wise Notes
+
+- Module 1 [Download](https://drive.google.com/uc?export=download&id=1jSIqQInX3yYDYjcglf7ELjid_uy8vJF1)
+- Module 2 [Download](https://drive.google.com/uc?export=download&id=1y4_diqgCbLjBeCVkCOGmFviWaW3_5MVF)
+- Module 3 [Download](https://drive.google.com/uc?export=download&id=1B0hgQrhnn5pDhiIJbcyZYKS0EqLDyMCN)
+- Module 4 [Download](https://drive.google.com/uc?export=download&id=1Yj9kzjb7qfutmfAq-rl3hRDYfqKFGtIa)
+- Module 5 [Download](https://drive.google.com/uc?export=download&id=1u5FkxxiqGBi6OySP-2M1B5J3CpxyJ4J0)
\ No newline at end of file
diff --git a/src/WikiSyllabus/KTU/2019_Scheme/S4/CSE/SUMMARY.md b/src/WikiSyllabus/KTU/2019_Scheme/S4/CSE/SUMMARY.md
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-# CSE
diff --git a/src/WikiSyllabus/KTU/2019_Scheme/S4/SUMMARY.md b/src/WikiSyllabus/KTU/2019_Scheme/S4/SUMMARY.md
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--- a/src/WikiSyllabus/KTU/2019_Scheme/S4/SUMMARY.md
+++ b/src/WikiSyllabus/KTU/2019_Scheme/S4/SUMMARY.md
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 #### CONTEXT
 
 - [ITT 204 - COMPUTER ORGANIZATION](./IT/ITT204/SUMMARY.md)
+- [CST 206 - Operating Systems](./CSE/CST206/SUMMARY.md)
+