With the Model S, Tesla's technology strategy was to start with a "clean-sheet" design,[65] and build an integrated computer hardware and software architecture at the center of its vehicles.[66] Doing so enables Tesla to provide online ("over-the-air") software updates to its cars,[67][68] which allows Tesla to improve the functionality and performance of its already-sold cars for free.[66] Tesla also continuously improve the hardware of its cars rather than waiting for a new model year, as opposed to nearly every other car manufacturer.[66]