## Reference
**[Release notes](release-notes.html)**\
What's new in each hledger version.
**[User manual](manual.html)**\
The main hledger manuals combined on one page for easy searching.
Includes:
[hledger](hledger.html)\
the command-line UI
[hledger-ui](hledger-ui.html)\
a curses-style UI
[hledger-web](hledger-web.html)\
a web UI
[hledger-api](hledger-api.html)\
a HTTP JSON server
[journal format](journal.html)\
hledger's native file format
[csv format](csv.html)\
hledger's CSV import system
[timeclock format](timeclock.html)\
a file format for precise time logging
[timedot format](timedot.html)\
a file format for human-friendly approximate time logging
## Contribute
**[Contributor Guide](CONTRIBUTING.html)**\
what's to do and how to do it