cpi - technical definition

(1) (Characters Per Inch) The measurement of the density of characters per inch on tape or paper. A printer's CPI button switches character pitch.

(2) (Counts Per Inch) The measurement of the resolution of a mouse/trackball as flywheel notches per inch (horizontal and vertical flywheels rotate as the ball is moved). Notches are converted to cursor movement.

(3) (CPI) (Common Programming Interface) See SAA and CPI-C.