Minecraft Mappings Explained: Mojmap vs Yarn vs MCP vs Intermediary

What Minecraft mappings are, how Mojmap, Yarn, MCP/SRG and Intermediary differ, how to tell which one a mod uses from its names, and what changed in 26.1.

The Four Names You Will Run Into

Mojmap

Yarn and Intermediary (Fabric)

MCP and SRG (Forge)

Which Mapping Does This Mod Use?

What Changed in 26.1: No More Obfuscation

Summary