David Conger, formerly a Professor of Computer Science and Business Computer Programming at the Albuquerque Technical-Vocational Institute, has developed software for a wide range of applications. These applications include military aircraft, games, a variety of specialized business applications, and programs for interactive TV. He currently produces custom software and technical documentation. His clients include Microsoft Corporation, for whom he has written developer documentation for the Windows Platform Software Development Kit (PSDK). The Windows subsystems he documented, in whole or in part, include DirectX, OpenGL, Extensible Scene Graph (XSG), Image Color Management (ICM), Still Image (STI), Windows Image Acquisition (WIA), Remote Procedure Calls (RPC), the Microsoft Interface Definition Language (MIDL) compiler, and the Mobile Internet Toolkit (MIT).