Need help identifying this icons

Still new with grasshopper, I’m working on a voroni project and this seems like a good starting spot for what I’d like to make, I’d like to understand the script but I can’t recognize half of those icons. Can anyone please help?

My list is gonna try to follow a kind of linear order. But as you type these in, you should recognize the icons.

Surface
Panel
Populate Geometry
Rectangle
Populate 2D
Bounding Box
Deconstruct Box
Domain Box
Voronoi
Explode
Cull Index
Nurbs Curve
Merge
Unit Z
Boundary Surface
Extrude