Lt in autocad stands for nothing realy, The difference between LT and the full version of AutoCAD is that LT does not include 3d functions and does not support Lisp. You can call it : lite low tech learning and training( in sweden) Less Trouble As far as I know LT doesn't mean anything.
AutoCAD LT is the lower cost version of AutoCAD, with reduced capabilities 1.AutoCAD LT lacks the ability to create 3D Capabilities 2.AutoCAD LT cannot be used on multiple machines over a network.