diff --git a/README.md b/README.md
index 3c8dfd81..737dc2af 100644
--- a/README.md
+++ b/README.md
@@ -1000,15 +1000,17 @@ _Functional Programming with Python._
 
 _Libraries for asynchronous, concurrent and parallel execution. Also see [awesome-asyncio](https://github.com/timofurrer/awesome-asyncio)._
 
-- [anyio](https://github.com/agronholm/anyio) - A high-level async concurrency and networking framework that works on top of asyncio or trio.
-- [asyncio](https://docs.python.org/3/library/asyncio.html) - (Python standard library) Asynchronous I/O, event loop, coroutines and tasks.
-  - [awesome-asyncio](https://github.com/timofurrer/awesome-asyncio)
-- [concurrent.futures](https://docs.python.org/3/library/concurrent.futures.html) - (Python standard library) A high-level interface for asynchronously executing callables.
-- [gevent](https://github.com/gevent/gevent) - A coroutine-based Python networking library that uses [greenlet](https://github.com/python-greenlet/greenlet).
-- [multiprocessing](https://docs.python.org/3/library/multiprocessing.html) - (Python standard library) Process-based parallelism.
-- [trio](https://github.com/python-trio/trio) - A friendly library for async concurrency and I/O.
-- [twisted](https://github.com/twisted/twisted) - An event-driven networking engine.
-- [uvloop](https://github.com/MagicStack/uvloop) - Ultra fast asyncio event loop.
+- Async I/O
+  - [anyio](https://github.com/agronholm/anyio) - A high-level async concurrency and networking framework that works on top of asyncio or trio.
+  - [uvloop](https://github.com/MagicStack/uvloop) - Ultra fast asyncio event loop.
+  - [asyncio](https://docs.python.org/3/library/asyncio.html) - (Python standard library) Asynchronous I/O, event loop, coroutines and tasks.
+    - [awesome-asyncio](https://github.com/timofurrer/awesome-asyncio)
+  - [trio](https://github.com/python-trio/trio) - A friendly library for async concurrency and I/O.
+  - [gevent](https://github.com/gevent/gevent) - A coroutine-based Python networking library that uses [greenlet](https://github.com/python-greenlet/greenlet).
+  - [twisted](https://github.com/twisted/twisted) - An event-driven networking engine.
+- Parallelism
+  - [concurrent.futures](https://docs.python.org/3/library/concurrent.futures.html) - (Python standard library) A high-level interface for asynchronously executing callables.
+  - [multiprocessing](https://docs.python.org/3/library/multiprocessing.html) - (Python standard library) Process-based parallelism.
 
 ### Date and Time