This is a reprint of the original edition of Lang's classic book "A First Course in Calculus". It covers all of the topics traditionally taught in the first-year calculus sequence in a brief and elementary fashion. The audience consists of those taking the first calculus course, in high school or college. "..Lang's present book is a source of interesting ideas and brilliant techniques." Acta Scientiarum Mathematicarum. "..It is an admirable straightforward introduction to calculus." Mathematika.