The Complete National Geographic Magazine 30 CD Rom Set is a rare and valuable collection spanning 111 years from 1888 to 1998. This set includes a comprehensive archive of arts and culture information in English, making it a valuable resource for education and reference purposes. With no manufacturer warranty, this product is a must-have for any National Geographic enthusiast looking to explore the rich history and content of the magazine. I do not believe they were ever used. See pictures.