DOS and a dot matrix

What is a DOS? I have none on my web.

I have only the silk with cross fibres instead.

Printing out messages, what is that for?

I talk to my friends standing at the door!

We were at the bank last night reviewing some things and I was shocked to see that the platform the bank uses for managing some things is still DOS based! Seriously! They seem to be moving forward to a different system, but it happening slowly and only a bit at a time.

And . . . to go along with the DOS program was a dot matrix printer to fill in the forms! So slow and noisy - my kids were amazed!