I've never been a fan of trying to find the slash command I was looking for via the chat box. It's too short and I can only see a couple commands at a time. So I pulled the slash commands out of the lua file Scott mentioned and cleaned them up a bit into a printable doc that I can have sitting on my desk. Thought I would share it for those as lazy as me.
nUI 5.02.05 DEV Slash Commands.pdf
nUI 5.02.05 DEV Slash Commands No Message.pdf
<edit> Added the second file. The first file includes the message displayed in the chat window when the command is entered. The second file does not.