Some submenus of Adding Nodes are missing!

I just finished a fairly simple model and decided that the simple texturing wasn’t enough. So, I looked at some tutorials and decided to use the node editor. I realized that when I was adding nodes,I didn’t have a shader submenu and a few others that I can’t recall. I looked back at the tutorials to check if they had to toggle it on or something like that, but it didn’t seem that way. I am pretty sure that it is the latest version both the tutorial and my own installed copy, but not certain.

Thanks in advance.

(NOTE: In the image, the cube is not my model, I just left my external hard drive where it’s stored at home. Just in case anyone asks.)

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