The adevs library supports the construction of discrete event models based on a variant of the Parallel DEVS formalism. In addition to basic and networked Parallel DEVS models, adevs includes support for dynamic structure models based on the Dynamic Structure DEVS formalism. A basic familiarity with DEVS is assumed, and several good texts are available for those who are not already familiar with DEVS in one of its many forms (see www.acims.arizona.edu for a collection of references, tutorials, research papers, and alternate implementations of the DEVS formalism). This manual provides a brief and (hopefully) intuitive introduction to DEVS, but the reader is strongly encouraged get a good book on the subject. The manual is organized into sections: