MB=Meyers Briggs personality typing. INTP is what results from the various free online tests I took a few years ago. There are 2 letters that can show up in the 4 slots thus 16 possible results. I is introvert. The N is for intuitive. I don't remember the other 2. When I read the description of what INTPs tend towards, it nailed me. The typing stems from Jung's thoughts on archetypes. The tests take about 10 minutes.