Alexandre Lag?e-Jacques wrote: 13W3's were used with Sun, SGI monitors. I think NeXT may have used those connectors, or something very similar to those. http://pinouts.ru/cgi-bin/view_filt.cgi?text=3W3&lang=eng says that IBM PowerPC machines also used this. If I remember right, the 13W3 monitors weren't interchangeable, and if you used a converter, you needed to make sure that your monitor would sync up to the computer. Sun for example was notorious for using fixed-sync monitors that wouldn't work with anything but their machines. What's funny is that they usually OEM'ed their monitors from, say Nokia, or Sony, and you could see another non-Sun branded monitor from the other two vendors which would be multisync and would work with almost everything, but the Sun branded ones wouldn't. :-) I'm glad that era is over.