Since biological engineering covers a wide spectrum, many departments now offer specialization options. Depending on the department and the specialization options offered within each program, curricula may overlap with other related fields. There are a number of different titles for BSE-related departments at various universities. The professional societies commonly associated with many Biological Engineering programs include the American Society of Agricultural and Biological Engineers (ASABE) and the Institute of Biological Engineering (IBE), which generally encompasses BSE. Some program also participate in the Biomedical Engineering Society (BMES) and the American Institute of Chemical Engineers (AIChE).