The use of the expert system "sht" (self-heating temperature) allows the assignment of the self-heating potential of a coal sample without the need for detailed laboratory experiments. The program requires only the input of a coal's proximate and ultimate analyses and heating value and can evaluate the self-heating tendency of a single sample, an entire database of samples, or a select group from a database. The program evaluates only the relative reactivity of a coal sample, and does not take into account other important factors in the self-heating process, such as mining conditions and practices and geologic conditions. However, it is an important first step in determining the self-heating risk of a mining operation and can have an impact on the prevention of spontaneous combustion mie fires. The program is available through the authors.