The primary classification areas are HB, HC, HD, HE, HF, HG, and HJ.
When searching the library catalog the term business by itself will likely yield too many items to be of much use. So, add additional terms such as management, industrial management, restaurant management, or franchise management. The same technique of adding modifying terms will work with specific areas of economics, accounting, or marketing.
Note: If searching for reference materials, then add REF to one of the text blocks in the Advanced Search page.