The graphics on these CDs are presented in Tiff format which can be used on both PCs and MACs. All are resource disks, not programs  to install on your hard drive. They can be used with programs which will import TIFF files, such as Pagemaker, Photoshop, Word Perfect, Word, etc..  Besides the graphics, a PDF copy of the catalog of the art work is included on the CD. You may print this for easy reference to the graphics.