If you are preparing an article, please try to find contact information. Usually, the snail mail address is unnecessary. Email addresses should be given in terms of Internet addresses. I'm not sure if this n-dash rule is hard and fast, so use your own judgement if it looks funny. Diskette sounds corporate and like a press release.
Disks go in drives.
See also, contact information. Finally, two blank lines end the article. For best results, don't use it in the first place. Try to vary your word choice to make for more interesting reading. We've always done it this way.