Educators and librarians- Normally our program is licensed for use on one computer only, as is most software. Rothe Technologies offers multiple site licenses for qualified institutions at no extra charge. Schools, libraries, convalescent homes and correctional institutions qualify for this special offer. Contact us or email us at rothetek@rothetechnologies.com if you qualify. This program will require 630 Megabytes of space on your hard drive. We will provide instruction on transferring the CD-ROM data to your computer hard drives.