You can define names of fields in the left-hand column. These will be the same for everybody on record. For each individual, you enter the appropriate numeric value for each key. Values of these numeric keys can be pure quantities, dates, times, money, etc. or ranges of these. These can then be used as selection criteria by an applet package called group link. This allows you to define a group profile, then draws up a list of those individuals on record who fit the profile. It is used for creating target lists for marketing and common-interest groups - or whatever you wish.
The above box is simply an image. When implemented as an applet, the operation of each button is displayed on the browser's status bar when the mouse pointer is over the button concerned.