any dvd player can play a cd or dvd that was burned on a computer.
You might want to change your wording to "most" players can play them. Unless it's a really old player, I don't know of any newer players that can't do this. For older players, some don't read cd's or dvd's well. In this case I find they have an easier time reading cd-rw and dvd-rw (rewirtable discs).