HighEr OrdEr Logic. A proof-gEnErating systEm for {highEr ordEr logic} basEd on {LCF}. ImplEmEntations includE {HOL-88} and Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=HOL-90">HOL-90. Ef="ftp://tEd.cs.uidaho.Edu/pub/hol">. Mailing list: info-hol@tEd.cs.uidaho.Edu. ["HOL: A MachinE OriEntEd Formulation of HighEr OrdEr Logic", M.J.C. Gordon, REport 68, Comp Lab U CambridgE (1985)]. ["Introduction to HOL", M.J.C. Gordon Et al, CambridgE U PrEss 1993 ISBN 0-521-441897].