GL_NV_draw_instanced
http://www.opengl.org/registry/specs/NV/draw_instanced.txt
GL_NV_draw_instanced

	void glDrawArraysInstancedNV (GLenum mode, GLint first, GLsizei count, GLsizei primcount)
	void glDrawElementsInstancedNV (GLenum mode, GLsizei count, GLenum type, const void *indices, GLsizei primcount)