Teletype Model 33 ASR teleprinter, with punched tape reader and punch, usable as a computer terminal The Teletype Model 33 is an electromechanical teleprinter designed for light-duty office use. It is less rugged and cost less than earlier Teletype models. The Teletype Corporation introduced the Model 33 as a commercial product in 1963,[1] after it had originally been designed for the United State