1. Software available from Farallon Computing of Alameda, CA.
2. Scope was written by K. Fredrickson and is available via ftp from 129.186.112.123 (username “scope” and password “guest”).
3. Image was written by Wayne Rasband at the U.S. National Institutes of Health and is available from the Internet by anonymous ftp from zippy.nimh.nih.gov or on floppy disk from NTIS, 5285 Port Royal Rd., Springfield, VA 22161, part number PB93-504868.
4. Software and hardware available from Dapple Systems of Sunnyvale, CA.
5. Software being written by Mary B. Anderson using Authorware®, available from Macromedia of San Francisco, CA.