Acronym	Term	Description
DRC	Design Rules Check	This step checks the spacing of the metal lines to insure that the design can be manufactured. Designs with too small of spacing can short in production.
LVS	Layout Versus Schematic	Checks to see that an extraction of the devices in layout matches the schematic design (netlist).
GDSII	Geometric Data Stream II	This is a format describing the "polygons", such as regtangles, that make up the metalization for the arrays. Layers other than metal are correct by construction and have already been generated and checked.