The High Luminosity Large Hadron Collider ¿ HL-LHC (O Br¿ning and L Rossi); The Physics Landscape of the High Luminosity LHC (M Mangano); Upgrade of the Experimental Detectors for High Luminosity LHC (F Hartmann, B Hippolyte, F Lanni, T Nayak, C Parkes and P Rumerio); Operational Experience from LHC Run 1 & 2 and Consolidation in View of Run 3 and the HL-LHC (M Lamont); Machine Physics and Performance (G Arduini, R De Maria, M Giovannozzi, G Iadarola, E M¿tral, Y Papaphilippou and R Tom¿s); Superconducting Magnet Technology for the IR Upgrade (E Todesco, G Ambrosio, P Ferracin, G L Sabbi, T Nakamoto, M Sugano, R Van Weelderen, P Fabbricatore, S Farinon, F Toral, M Sorbi, M Statera, Q Xu, J M Rifflet and H Felice); RF Systems (R Calaga, P Baudrenghien, G Burt, O Capatina, E Jensen, E Montesinos and A Ratti); Collimation of HL-LHC Beams (S Redaelli, A Bertarelli, R Bruce, F Carra, A Lechner, A Mereghetti and A Rossi); Circuit Layout, Powering and Protection (F Rodr¿guez Mateos, T D Catal¿o Da Rosa, F Men¿ndez C¿mara, S Yammine and M Zerlauth); Cold Powering of the Superconducting Circuits (A Ballarino and P Cruikshank); Warm Powering (M Martino, J-P Burnet and S Yammine); Machine Protection in the High Luminosity LHC (A Apollonio, P B¿langer, D Carrillo, R Denz, F Rodriguez Mateos, B Panev, A Siemko, J Uythoven, A Verweij, D Wollmann and M Zerlauth); Interface with Experimental Detector in the High Luminosity Run (H Burkhardt and F S¿nchez Gal¿n); Cryogenics for the HL-LHC (S Claudet, G Ferlin, E Monneret, A Perin, M Sisti, R Van Weelderen, A Lees, V Gahier, K Brodzinski and L Delprat); Energy Deposition and Radiation to Electronics (F Cerutti, R Garcia Alia and A Tsinganis); 11T Dipole and New Connection Cryostats for Collimators (B Bordini, L Bottura, A Devred, L Fiscarelli, M Karppinen, G de Rijk, L Rossi, F Savary, D Sch¿rling and G Willering); Vacuum System (V Baglin, P Chiggiato and C Garion); Beam Instrumentation and Diagnostics (E Bravin, R Jones, T Lefevre and R Veness); Injection and Beam Dump Systems (C Bracco, M J Barnes, W Bartmann, M Calviani, D Carbajo Perez, E Carlier, L Ducimetiere, M I Frankl, B Goddard, J Jowett, A Lechner, N Magnin, A Perillo Marcone, T Polzin, V Rizzoglio, V Senaj, L Vega, V Vlachodimitropoulos and C Wiesner); Controls Technologies (J Serrano, G Daniluk, E Gousiou and C Roderick); Beam from Injectors: The LHC Injectors Upgrade (LIU) Project (M Meddahi, G Rumolo, R Alemany, H Bartosik, G Bellodi, J Coupard, H Damerau, G P Di Giovanni, A Funken, R Garoby, S Gilardoni, B Goddard, K Hanke, A Huschauer, V Kain, A Lombardi, D Manglunki, B Mikulec, F Pedrosa, S Prodon, R Scrivens and E Shaposhnikova); Integration, (De-)Installation and Alignment (P Fessia and H Mainaud Durand); The HL-LHC Technical Infrastructure (L Tavian); HL-LHC IT String and Hardware Commissioning (M Bajko and M Pojer); SRF Cryogenic Test Facility for the HL-LHC (L Tavian, G Vandoni and W Venturini Delsolaro); The International Network of Test Infrastructures for the HL-LHC Magnets and Cold Powering System (M Bajko); Beam-beam Long Range Compensation: From Concept to Validation (Y Papaphilippou and G Sterbini); Non-Linear Optics Measurements and Corrections (E H Maclean, F Carlier, J W Dilly, M Giovannozzi, N Karastathis, T H B Persson and R Tom¿s); The Role of Noise on Beam Stability and Performance in HL-LHC (X Buffat, S V Furuseth, E M¿tral, T Pieloni, C Tambasco and D Valuch); Crystal Collimation of Heavy-Ion Beams (S Redaelli, R Bruce, M D'Andrea, D Mirarchi and R Rossi); High Field Accelerator Magnets for Next Generation Colliders ¿ Motivation, Goals, Challenges and R&D Drivers (L Bottura);