From experience we learned that the analysis of skewed tracks in CR-
39 detector resulting, for instance, from target fragmentation, hot particle 
decay, neutron-induced charged particles, or simple calibration experiments 
with accelerated heavy ions is difficult if not impossible by fully automatic 
measuring systems. This was the motivation to develop an interactive 
computer program capable of measuring not only the track coordinates on 
the detector foil surface, minor/major track axes and azimuthal track angle, 
but also projected track length, diameter of a rounding at the end of a track 
hole and track depth (the distance from the foil surface to the track bottom 
end). 
	The entire system consists of an optical microscope, a manually 
controlled moving stage, focusing system, CCD camera, video digitizer and 
a personal computer. After completing the measurements, besides all the 
above mentioned track parameters, the number of analyzed individual tracks 
and/or number of so-called “stars” of tracks as well as other auxiliary data 
are written in an ASCII output file which can then be processed with some 
other suitable software, e.g. electronic tables. From this processing the 
distribution of etch rate ratio vs particle residual range (important for particle 
identification), event multiplicities and the reconstructed point of interaction 
in the case of target fragmentation, and the size and activity of the hot 
particle can be obtained. In this contribution the program is briefly described 
and its utilization illustrated by some selected examples.