DC file is a project file created using IMSI DesignCAD software. It contains elements of 2D/3D engineering model. DC file can hold various types of data and information: electrical, mechanical, hydraulic, architectural, and structural.

DC files are typically used for storing construction and spatial planning projects. DC file also holds architectural, elevation, and cross-section drawings. DesignCAD program was created in 1985 and is still actively developed by the producer.