Chapter 1. Introduction and history of formation of the NSS.- Chapter 2. Salient features of the NSS.- Chapter 3. Sample designs adopted in the NSS over its 75 years of operation.- Chapter 4. Major changes in sample design over the 75 years of functioning of the NSS.- Chapter 5. Three pilot surveys conducted by NSS.- Chapter 6. Discussion on global survey practices. Chapter 7. Derivation of NSS design-based estimates of aggregates and ratios.- Chapter 8. Level of precision of key estimates as per the NSS.- Chapter 9. Strengthening the NSS database.