Adjective
letter-quality (not comparable)
Printed to a sufficient visual standard to be sent as a letter.
Since it could drive an IBM Selectric typewriter (a letter-quality printer), it may be considered the first word processing program, but the term word processing itself was only introduced, by IBM 's Böblingen Laboratory in the late 1960s. Source: Internet
While the text-quality of a 24-pin was still visibly inferior to a true letter-quality printer the daisy wheel or laser-printer, the typical 24-pin impact printer printed more quickly than most daisy-wheel models. Source: Internet
These printers were also referred to as letter-quality printers because they could produce text which was as clear and crisp as a typewriter. Source: Internet