TrackWorks provides a comprehensive control system for all major functions of a motorized digital microscope such as one of the instruments in the Zeiss Axio Imager series. The software supports a range of configuration and calibration options, switching between light sources, changing objectives, stage control and image capture using the digital microscope camera. In addition TrackWorks supports a number of functions specific to the requirements of fission track analysis and thermochronology. These include location of coordination marks on a slide, generating a series of points for counting on a standard mica, labeling grain positions for counting or image capture, an alignment routine for pairing grain and mica locations using the external detector method (EDM), and a series of tools for interactively measuring c-axis directions, track lengths, other track dimensions, as well as counting manually- selected track positions, if desired. The primary function of TrackWorks, however, is to acquire and save comprehensive image sets which record all of the optical information available to an observer, for later processing and analysis in the companion package, FastTracks. The software therefore includes a series of options for saving and retrieving files, as well as recording and exporting various data sets to hard disc.