---
title: "11-sets-maps-trees"
tags: 
- cosc201
- lecture
sr-due: 2022-04-12
sr-interval: 3
sr-ease: 250
---

A [set](notes/set.md) is a collection of elements with no repetition allowed

A [hash-map](notes/hash-map.md) is a set of key value pairs

A [tree](notes/tree.md) is a general concept of a way of organising data.