The Microsoft Office Specialist (MOS) certification is an entry-level certification program designed for professionals operating with Microsoft Office applications. MOS credentials are well-known certifications that validate your specialized technical expertise in applications within the Microsoft Office Suite. The Microsoft MOS certification exam certifies that a professional can diagnose and resolve all types of issues related to that particular technology. The Office certification training program validates a candidate's ability to accomplish essential job tasks across multiple programs in the Microsoft Office Suite. It exhibits that experts are capable of getting the most out of Office by earning a MOS certification. These include Microsoft Word, Excel, Outlook, PowerPoint, and Access. The certifications are designed for people with careers as administrative professionals, clerical workers, and business analysts.