ELI5: Explain Like I'm 5

Data structure diagram

A data structure diagram is like a map that shows how different pieces of data are related to each other. It looks kind of like a tree with circles, arrows, and other symbols. The circles are like boxes, and each circle usually shows one piece of data. The arrows connect the circles and show how the pieces of data are related. Data structure diagrams are used by computer programmers to help them write code that works with a certain type of data.