# Introduction

There are three building blocks on the Interface layer: the Process Frame, the Bundled Flow, and the Bundled Connector. On the Map/Model layer, you'll find four basic building blocks: the Stock, the Flow, the Converter, and the Connector. In addition, you'll find one specialized building block: the Decision Process Diamond. This Chapter details the mechanical aspects of using these building blocks.

Figure 4-1 serves as a high-level directory to the building blocks. Simply click on a hyperlink (or on the icon for a building block) to be taken to the appropriate discussion. Note that at the end of the chapter, you'll find a set of appendices that detail some of the special-purpose capabilities of the software's building blocks.

Figure 4-1 An Overview of Building Blocks