1) The document provides an index and details for various SAP CO (controlling) notes including cost center accounting, internal orders, profitability analysis, product costing, and actual costing.
2) Key aspects of controlling include cost elements, cost centers, internal orders, and profit centers which are used for internal reporting and analysis of costs and profits.
3) The document outlines steps for basic controlling setup including maintaining controlling areas, cost center hierarchies, versions for budgets, and number ranges for documents.