1. Introduction
2. J-PLUS Definition and Implementation
2.1. The OAJ: An Observatory for Large Sky Surveys
2.2. JAST/T80 and T80Cam
2.3. J-PLUS Filter Set
2.4. J-PLUS Survey Strategy
2.5. J-PLUS Pipelines and Data Management
2.6. J-PLUS Photometric Calibration
3. J-PLUS Early Data Release (EDR)
3.1. J-PLUS Science Verification Data (SVD)
4. J-PLUS Science Cases
4.1. Exploring the MW Halo
4.2. Studies in the Nearby Universe
4.3. Redshift Windows in the Distant Universe
4.4. Variable Sources
5. Summary and Conclusions