Computer printer.
A line matrix is a type of printer which is a compromise between a dot matrix printer and a line printer.
Dot matrix printers
Yes, "dot matrix" is an older type of printer that you don't see much now, because inkjet and laser printers have become standard.
There is no type of gas given off from a dot matrix printer. Maybe a slight smell from the inked ribbon if held close enough to your nose!
draft
No, a dot matrix printer has small pins that hit a ribbon of ink. A laser printer uses toner type ink.
impact technology
Dot Matrix
A dot matrix is an impact printer. A scanner is not a printer.
Laser is the fastest printer.
laser, inkjet and dot matrix.
To type manuscripts, you should use clear, readable 12 pt. type; no dot matrix or pale type.