A three box design with a protruding hood in the front, a passenger cabin in the middle, and a protruding trunk at the rear. Also a practical design – generally with the windscreen (A pillar) meeting the front wheels and rear window (B or C pillar) meeting the rear wheels – both for structural strength but also to maximize usable interior space.The sedan has now been eclipsed by the station wagon – a two box design which is more practical still (some also call them crossovers or SUVs).Everything else – fastbacks, shooting brakes, hatchbacks, targa’s, cabrio’s, coupe’s etc. are a variation of the two.