WHAT DOES D20 MEAN?

With the discharge of your 4th edition of Dungeons & Dragons in 2008, Wizards with the Coast revoked the first d20STL, replacing it by using a new license specifically for D&D, referred to as the Game System License. The terms of this license are much like the d20STL, but there's no related OGL or Open content material, plus the 4th-edition SRD sim