Calculus

infinitesimal calculusdifferential and integral calculusclassical calculuscalculichangeElementary calculusrate of changethe calculusadvanced calculusanalytically

Calculus (from Latin calculus, literally 'small pebble', used for counting and calculations, as on an abacus) is the mathematical study of continuous change, in the same way that geometry is the study of shape and algebra is the study of generalizations of arithmetic operations.wikipedia