DCM 4.0 Professional Edition - Version 4.0 DCM 4.0 PE is an application software for the operation and management of any professional services firms. It is specifically designed and developed for professional services firms like legal firms, professional IT firms, consultancy firms, accounting firms and any professional services firms that require a simple and easy-to-use software to maintain optimum cash flow in the business and also at the same time have all the necessary accounting records completed.