What is the difference between manual and computer typesetting?

Manual typesetting: The form was placed in a press, inked, and an impression made on paper. During typesetting, individual sorts are picked from a type case with the right hand, and set into a composing stick held in the left hand from left to right, and as viewed by the setter upside down.

Computer typesetting: Computerized typesetting, method of typesetting in which characters are generated by computer and transferred to light-sensitive paper or film by means of either pulses from a laser beam or moving rays of light from a stroboscopic source or a cathode-ray tube (CRT).