3. A printer according to claim 4, wherein said storing means include a read only memory where the instructions for tracing each character are stored in form of a routine addressable by coded input signals, comprising a counter conditionable by said input signals for starting to count, and means for causing said addressing means to address the subsequent instructions of each routine by supplementing said input signals with the counting signals of said counter.
7. A printer according to claim 3, wherein each one of said routines includes a plurality of bytes, each byte having a pair of portions for controlling the tracing movement of said element for each segment of character along said coordinates, each one of said portions comprising an indication of the value of the speed of said segment for conditioning an associated one of said control circuits and an indication of the direction of movement for conditioning direction control means associated with said control circuits.