We describe a FORTRAN 77 implementation of the optimal jet definition for
identification of jets in hadronic final states of particle collisions. We
discuss details of the implementation, explain interface subroutines and
provide a usage example. The source code is available from
http://www.inr.ac.ru/~ftkachov/projects/jets/Comment: version to appear in Comp. Phys. Commun., 36 page