What does MODL stand for?

Module

A unit of length used as a basis for dimensional coordination and by which the planning of buildings can be to some extent standardized eg - a dimension of 100mm used as the fundamental increment in Modular Co-ordination. A board assembly and its associated mechanical parts. A module contains everything required to occupy one or more slots in a mainframe chassis. A program unit that is discrete and identifiable with respect to compiling, combining with other units, and loading.