# Introduction to HackMD
[HackMD](https://hackmd.io/s/features) is a realtime collaborative note editor. It uses markdown syntax.
The basics include plain text, *italic* or **bold** text,
## headers
### of different levels,
1. numbered
2. lists,
1. numbered
2. sublists,
- unorderethed
- lists,
- unordered,
- sublists
and [links.](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet)
### *These* can
1. be ***combined***
- in [**many**](https://hackmd.io/vZBi_mgVRrqFZRPIKFctAA) ways.