Based on your current position or area of interest, select a primary discipline from the broad list of categories in the drop down menu. This discipline selection should best match your current profession or area of expertise. You will be able to add additional skills and interests to your member profile once you complete the registration process.
Once you select your primary discipline category, it will be shown above the drop down as your chosen discipline. The drop down menu will then repopulate with a more detailed list to narrow your focus as deeply as you want, given the category.
You can continue to select sub-categories which will be displayed above the drop down. If you wish to change any level of the categories selected, click on the title link and you will taken back to that level.
By selecting UP from the drop down, you remove the most recent choice of category selection and can re-select a category.