---
title: "Mac glossary: disk, memory, speech, audio terms · MacMelon"
description: "Definitions for the words behind MacMelon apps: DerivedData, purgeable space, memory pressure, swap, on-device speech, per-app volume, Liquid Glass, and more."
url: "https://macmelon.com/glossary"
---

# Glossary

Short definitions for the words these apps depend on. Each one says what the term means, then what MacMelon actually does with it.

## M

[Menu barThe system strip at the top of a Mac screen, where status items live.](https://macmelon.com/glossary/menu-bar)