MANSFIELD, Mass.--(BUSINESS WIRE)--Quadrant Software, LLC, a Candescent Partners company and the leader in Document Output Management (DOM), today announced it has acquired IBM i modernization market leaders Business Computer Design, Inc. (BCD), located in Chicago, and Victoria, BC-based ExcelSystems Software Development, Inc. (ESDI). BCD and ESDI are two of the most successful software organizations in the IBM i marketplace, with more than 35 years of experience in providing modernization solu