Local, regional, state and country fairs may or may not choose to use these new categories, dependent on the needs of their area. Please check with your affiliated fair(s) for the appropriate category listings at that level of competition. Many projects could easily fit into more than one ISEF category. We highly recommend that you review the entire listing of the new categories before choosing the category that most accurately describes your project. You don’t need to compete in the same category as in your regional or state competition. Furthermore, most regional and state competitions do not use subcategories. You should carefully consider which subcategory best describes your project because your judges will be assigned based on their expertise in your chosen subcategory. If the project could be in multiple subcategories (or categories), it is best to select the primary subcategory of your project rather than “Other.” Animal Sciences (ANIM)Behavioral and Social Sciences (BEHA)Biochemistry (BCHM)Biomedical and Health Sciences (BMED)Biomedical Engineering (ENBM)Cellular and Molecular Biology (CELL)Chemistry (CHEM)Computational Biology and Bioinformatics (CBIO)Earth and ...