This document presents the highlights of ONERAs activity in 1988. In many areas, progress was registered simultaneously on three fronts: theoretical research, numerical modeling, experiments. The research in external aerodynamics thus offered the possibility of reducing airfoil drag by 50 percent for a transport aircraft. Meshing techniques with automatic adaptation allowed computation of the flow around a complete Airbus A 320 configuration in landing configuration, with flaps, slats and landing gear extended. The same is true for the Ariane 6/Hermes space plane assembly at lift-off as well as for Hermes during landing. In parallel to this progress in numerical methods, mention should be made of the record activity of the Chalais-Meudon blowdown wind tunnels, in particular for the Hermes program. As concerns the internal aerodynamics of turbomachines, initial results were achieved on a Navier-Stokes computation code for 3D viscous flows in compressor and turbine blades. In the area of ramjets, the development of combustion chambers with walls cooled by a gas film should be mentioned. Extensive research was continued on ignition-starting of the cryogenic motors for satellite launch vehicles. Experiments are now being conducted on a model of the Ariane 5 propulsion system at the Fauga-Mauzac Center. In the area of materials, the results obtained on superalloys for turbomachine disks and blades and on their fabrication by powder metallurgy should be mentioned. For structures, mention should also be made of the experimental validation of cracking simulation and the first high temperature multiaxial tests on monocrystalline alloys for turbine blades. This report of Science Technology Europe ONERA: 1988 report of french aerospace research agency.