The dot matrix is the least expensive; the 24-pin model will print closer to letter quality than the 9-pin model.

I am puzzling over the dot matrix display board that's trying to tell me what trains are coming my way.

In 2000 passenger information systems were updated and now use dot matrix display screens.

Paper slid through it as the dot matrix clacked back and forward.

Passenger information systems were updated during 2007 and now use dot matrix display screens.

The lowly dot matrix had a lot going for it, though.

A dot matrix is useful for marking materials other than paper.

Passenger information systems were updated at the same time and now use dot matrix display screens.

It can then be printed on a dot matrix or laser printer.

A dot matrix is a 2-dimensional array of dots used to represent characters, symbols and images.