(a,b)-tree is a type of computer programming tree structure. It looks like a tree with branches and roots, where each branch is made up of a bunch of leaves. The number of leaves is always the same, and is referred to as "a". There are also lots of branches, which are referred to as "b". This allows the tree to be organized in a way that makes it easy to store and search data. For example, if you have a list of names you could use an (a,b)-tree to help you find a particular name quickly. The tree helps you locate the right branch, and then you can look through the leaves of that branch to find the right name.