Vlisp Patrick Greussayca 1973. A {Lisp} dialect with a fast {interpreter} and a portable {virtual machine}. Introduced the "{chronology}", a dynamic environment for implementing interrupts. Led to {Le_Lisp}. See also {ObjVlisp}. ["Contribution a la Definition Interpretive et a l'Implementation des Lambda-Langages", P. Greussay, These d'Etat, U Paris VI, Nov 1977].