What's this kind of joint called?

What's this kind of joint called? tab and slot joint Slots, like those found in 3D puzzles or partitions in trays, somewhat similar to a traditional halved joint or dado Tabs, like a tenon or the fingers in a tab slot The joint includes a groove, set of tabs and set of slots The groove is disposed across the panel The groove passes through the first skin and at least a

tab slot Choose from our selection of T-slotted framing rails, T-slotted framing structural brackets, T-slotted framing fasteners, and more

tab and slot welding Tab and Slot joints are when you use tabs and slots together to join two pieces of cardboard together Instead of inserting two slots to line up But in the process I have been spending most of my time adjusting the plans to fit the material thickness I am using (most are tab and slot