diff --git a/README.md b/README.md
index d58568b..4643ac8 100644
--- a/README.md
+++ b/README.md
@@ -328,7 +328,7 @@ PEP440     : 2020.41
 ```
 
 
-### Auto Increment Parts: `BUILD`/`INC0`/`INC1`
+### Auto Increment Parts: `INC0`/`INC1`/`BUILD`
 
 These parts are incremented automatically, and do not use/require a CLI flag: `BUILD`/`INC0`/`INC1`.
 
@@ -350,6 +350,21 @@ $ bumpver test '2020.10.1' 'YYYY.MM[.INC0]' --date 2020-11-01
 New Version: 2020.11
 ```
 
+You can the `BUILD` part to [maintain lexical ordering][url_pypi_lexid]  of version numbers. This means that the expression `older < newer` will always be true, whether you are dealing with integers or strings, whether you are using software that understands how to parse version numbers or not.
+
+```shell
+$ bumpver test '2020.1001' 'YYYY.BUILD'
+New Version: 2020.1002
+
+$ bumpver test '2020.1002' 'YYYY.BUILD'
+New Version: 2020.1003
+
+$ bumpver test '2020.1999' 'YYYY.BUILD'
+New Version: 2020.22000
+```
+
+[url_pypi_lexid]: https://pypi.org/project/lexid/
+
 
 ### Persistent Parts: `BUILD`/`TAG`/`PYTAG`
 
@@ -377,6 +392,7 @@ New Version: v2020.1052
 PEP440     : 2020.1052
 ```
 
+
 ### Explicit `--set-version`
 
 If the various automatic version incrementing methods don't work for you, you can explicitly do `--set-version=<version>`.