1. INTRODUCTION  
2.2. Data Processing and Source Detection  
2.3. The Serendipitous Survey Source Catalog  
2.4. Key Changes in NSS80 with Respect to NSS40  
3. THE MULTI-WAVELENGTH DATA  
3.1. Lower-energy X-ray Counterparts  
3.2. Finding IR & Optical Counterparts Using Nway  
3.3. Optical Spectroscopy  
4.1.2. Band Ratios  
4.1.3. Redshift-Luminosity Plane  
4.2. MIR Properties of the NSS80 AGN  
4.3. Optical Photometric and Spectroscopic Properties  
4.4. Composite Spectra of the NSS80 AGN  
5. SUMMARY