This document discusses managing support as a business. It begins with an overview of viewing support as a corporate investment and discussing metrics like support funding levels, revenue, and margins. It then discusses what constitutes an S-business and trends in the service market like an increasing shift to services. Key topics a service manager should understand are reviewed like unit costs, revenue sources, and profitability and ROI measures. Finally, it discusses developing a support strategy and making the case for investments by highlighting the ROI of customer loyalty.