Downloads: What programs do I need to open/view/print your resources?

  • A file with a txt extension can be opened by any word processor, e-mail program, text editor, or file manager client. It is plain, unformatted, ascii text.
  • A file with a pdf extension must be opened using Adobe Reader (free download at or Adobe Acrobat (commercial). Our PDFs have been created using version 4 or 6 of Adobe Acrobat; they require version 4 or later to be opened.
  • A file with a zip extension is a compressed archive, and requires a utility such as WinZip or PKUnzip to open and extract the file(s) within. We typically ZIP our larger files, or collections of files, to make downloading easier.