# 800 Lost Items and a Line at the Desk: What a Data Structure Is

Keep a school lost-and-found's 800 items so the lunch line keeps moving: why one box, a list and A to Z order fall short, what a data structure is, and the trade-off every one of them makes.

![Cheat sheet: 800 Lost Items and a Line at the Desk: What a Data Structure Is](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/240951e1611441e994943bc2a059fd4c.webp)

- Category: Data Structures
- Level: Novice
- Tags: Algorithm, Data Structure, data structures, software-development, Trade-Off
- Updated: November 3, 2026

Source: https://www.ask-codey.com/cheat-sheets/ds-what-is-a-data-structure-cheat-sheet