# Definitions used in the Manual/Help File

Some of the nomenclature used in this manual/help file is as follows: All fluid networks are built of items of fluid equipment such as pipes, valves, and pumps. Within the context of this manual and help file such items of fluid equipment are often called components. Often the flow characteristics of the components are stored in a database to facilitate ease of reuse. Components are accessed via the Group Tabs on the Component Palette and their flow characteristics are stored and accessed via the Database menu. Each fluid network (or part of a complete network) is built on the flowsheet. FluidFlow can open as many flowsheets as desired. As well as holding components the flowsheet can also display user entered text, results and input data. Each item on the flowsheet is called an element. For example a pump is a component and also an element once placed on the flowsheet. A block of user entered text on the flowsheet is also an element. Gas Volume Definitions are given in the gas section. Nomenclature used in mathematical formulas are given in the nomenclature section.