This is sheet goods racks, and small item/stock storage from the shelve uprights brackets and PVC thin wall drainage piping sections with plex X's in side to divide each in to 4 section for gas welding and brazing rod
The shoe boxes from the big box stores on sale, along with the larger sizes will hold all the parts from the copy machines and other items you take apart.
More of the shoe box storage on a counter shelf
Kitty litter buckets with the lids and hole cut in the top used to hold rope for easy keep clean storage and dispensing.