<B>A</B> is for Automobiles, machines on wheels. <P> <B>B</B> is for Belts turning, fuel burning, the buzz and bark of engines. <P> <B>C</B> is for Curves and crowds and cars, of course -- <P> A century of racecars, from bare beginnings to present-day marvels, from stock cars to Formula 1, from Ford to Ferrari, caught in crackling action, in fan-friendly pictures, and in words that bounce and jounce for the fun of it.