Xming ``server'' allows external X11 processes to display
windows on your Windows PC. More recent Mac's should already have
this capability under OS X and Unix (Linux) installations typically
have this capability, so they won't need Xming. In simple language,
you need to install it on your Windows PC if you want to use PuTTY to
display things like gnuplot graphs. The Xming developer, Colin
Harrison, allows you to download older versions for free from
SourceForge, which should work fine for our purposes, but he asks for
a donation to download newer versions, which you might consider.
Download Xming from SourceForge and install it.
Here are the steps for configuring XMing on your Windows machine
Test your installation by opening a PuTTY window and typing
xterm. After several seconds you a new xterm window should pop
up on your screen.
Note that if you reboot your computer, you will also need to restart Xming.