I need some advice on how to allow a user to select options from a multiple select box that has over 25k options.
Currently, I have 3 select boxes that filter the MAIN select box. If no options are selected from the first 3 filtering boxes, this will display ALL the 25k options in the MAIN select box. They can then click on 1 or some of these 25k options and move them to the SELECTED options box.
My issue is, obviously with an old school method 25k is not something the browser can handle. What other ideas and designs are there where the user can select some of these options. Bear in mind, these options are not something the user will know. So a type in field won't work since they don't know what to type.