hol88-help 2.02.19940316-31 (s390x binary) in ubuntu yakkety

 The HOL System is an environment for interactive theorem proving in a
 higher-order logic. Its most outstanding feature is its high degree
 of programmability through the meta-language ML. The system has a
 wide variety of uses from formalizing pure mathematics to
 verification of industrial hardware. Academic and industrial sites
 world-wide are using HOL.