Long ago and far away -- about 1982 or 1983 -- there was a database called "Nutshell" which used the simple metaphor of index cards to let you store and use information. I remember Nutshell fondly even if it and the MS-DOS platform that supported it are only fit for computer museums. A Macintosh version of Nutshell evolved into the successful software program FileMaker, which I think is one of the better database programs around, available for both Macs and Windows-based PCs.