Finally! Time saving, high quality outline maps the whole world can use. All you need is a computer and a printer. Use for teaching history, science, literature and even geography. Print as many maps for your own use as you need. No need to find a copy machine. Compatible with Windows 3.1 or above, Macintosh OS7.1 or above. All maps in "printable" PDF format, (Acrobat Reader 3.1 or above, required).