GENS is a calculus (an *(abstract VM)?) of explicit lexical environments by _(Mario Blazevic). On top of GENS, you can implement the _(lambda calculus), your favorite object-oriented languages, etc.

<ul class="links">
<li>In proceedings of _("Multiparadigm Programming with Object-Oriented Languages"|http://www.fz-juelich.de/nic-series/Volume7/Volume7.html) (MPOOL 2001) International Workshop:
<br>Mario Blazevic and Zoran Budimac, <em>An Environment-based Multiparadigm Language</em>, p. 97.
</ul>
