Business Applications (BA): The core business applications series that correspond to a subset of all applications for an EIN. This series includes all applications for an EIN, except for applications for tax liens, estates, and trusts, applications outside of the 50 states and the District of Columbia or those with no state‐county geocodes, applications with a NAICS sector code of 11 (agriculture, forestry, fishing and hunting) or 92 (public administration), and applications in certain industries (i.e. private households, certain financial services, civic and social organizations).