CORDIC computing technique was de- veloped especially for use in a real-time digital computer where the majority of the computation involved the discontinuous, programmed solution of the trigonometric relationships of navigation equations and a high solution rate for the trigonometric relationships of coordinate transformations. A prototype computer, CORDIC I, based on this computing technique, has been designed and constructed at Convair, Fort Worth. Although CORDIC I may be classified as an entire- transfer computer, its design is not based on the con- ventional "pencil and paper" computing technique of general-purpose computers. FUNCTIONAL DESCRIPTION