35. An electronic typewriter, comprising a single tracing element for tracing alphanumeric characters, spacing means for relatively moving said tracing element and the paper in a letter spacing relationship, a read-only memory for storing addressable numerical instructions for each one of said characters, driving means adapted to be controlled for driving said tracing element as to move along a pair of coordinates, an entry keyboard, and an encoder for producing in response to the depression of each key of said keyboard a code addressing the said memory for extracting the instructions to cause said tracing element to trace a corresponding character, printing control means operable for conditioning said driving means according to a character to be printed, detecting means for detecting the position of said tracing element, D/A converting means for converting the numerical instructions so addressed into command signals, comparison means for comparing the signals given by said detecting means and by said converting means, and servo control means conditioned by said comparison means for controlling said driving means.
35. An electronic typewriter, comprising a single tracing element for tracing alphanumeric characters, spacing means for relatively moving said tracing element and the paper in a letter spacing relationship, a read-only memory for storing addressable numerical instructions for each one of said characters, driving means adapted to be controlled for driving said tracing element as to move along a pair of coordinates, an entry keyboard, and an encoder for producing in response to the depression of each key of said keyboard a code addressing the said memory for extracting the instructions to cause said tracing element to trace a corresponding character, printing control means operable for conditioning said driving means according to a character to be printed, detecting means for detecting the position of said tracing element, D/A converting means for converting the numerical instructions so addressed into command signals, comparison means for comparing the signals given by said detecting means and by said converting means, and servo control means conditioned by said comparison means for controlling said driving means. 36. An electronic typewriter according to claim 35, comprising a supplementary read-only memory containing additional instructions relating to additional characters including underlining, and accents, and manual controls for automatically addressing said additional instructions to be added to the instructions of each character in the control of said tracing element.