Editing Dot matrix printing (section)

====LA30====
The DECwriter LA30 was a 30 character per second dot matrix [[printing terminal]] introduced in 1970 by [[Digital Equipment Corporation]] (DEC) of [[Maynard, Massachusetts]]<ref>{{cite book |title=PDP-11 Processor Handbook |date=1973 |publisher=[[Digital Press]], [[Digital Equipment Corporation]] (DEC) |pages=1–4 |quote=Digital Equipment Corporation (DEC) designs and manufacturers many of the peripheral devices offered with PDP-11's. As a designer and manufacturer of peripherals, DEC can offer extremely reliable equipment... The LA30 DECwriter, a totally DEC-designed and built teleprinter, can serve as an alternative to the Teletype.}}</ref>

It printed 80 columns of uppercase-only 7 × 5 [[dot matrix]] characters across a unique-sized paper. The printhead was driven by a [[stepper motor]] and the paper was advanced by a noisy [[solenoid]] [[ratchet (device)|ratchet]] drive. The LA30 was available with both a [[parallel interface]] (LA30-P) and a [[serial interface]] (LA30-S); however, the serial LA30 required the use of [[fill character]]s during the carriage-return. In 1972, a receive-only variation named LA30A became available.