diff --git a/content/get-started/writing-on-github/working-with-advanced-formatting/creating-and-highlighting-code-blocks.md b/content/get-started/writing-on-github/working-with-advanced-formatting/creating-and-highlighting-code-blocks.md
index 7690eba8498a..6b44a19686e0 100644
--- a/content/get-started/writing-on-github/working-with-advanced-formatting/creating-and-highlighting-code-blocks.md
+++ b/content/get-started/writing-on-github/working-with-advanced-formatting/creating-and-highlighting-code-blocks.md
@@ -69,7 +69,7 @@ We use [Linguist](https://github.com/github/linguist) to perform language detect
 {% ifversion mermaid %}
 ## Creating diagrams
 
-You can also use code blocks to create diagrams in Markdown. GitHub supports Mermaid, geoJSON, topoJSON, and ASCII STL syntax. For more information, see "[Creating diagrams](/get-started/writing-on-github/working-with-advanced-formatting/creating-diagrams)."
+You can also use code blocks to create diagrams in Markdown. GitHub supports Mermaid, GeoJSON, TopoJSON, and ASCII STL syntax. For more information, see "[Creating diagrams](/get-started/writing-on-github/working-with-advanced-formatting/creating-diagrams)."
 
 {% endif %}
 ## Further reading
diff --git a/content/get-started/writing-on-github/working-with-advanced-formatting/creating-diagrams.md b/content/get-started/writing-on-github/working-with-advanced-formatting/creating-diagrams.md
index f347d12fe063..8d0b98c3151c 100644
--- a/content/get-started/writing-on-github/working-with-advanced-formatting/creating-diagrams.md
+++ b/content/get-started/writing-on-github/working-with-advanced-formatting/creating-diagrams.md
@@ -38,11 +38,11 @@ graph TD;
 
 {% endnote %}
 
-## Creating geoJSON and topoJSON maps
+## Creating GeoJSON and TopoJSON maps
 
-You can use geo/topoJSON syntax to create interactive maps. To create a map, add geoJSON or topoJSON inside a fenced code block with the `geojson` or `topojson` syntax identifier. For more information, see "[Creating and highlighting code blocks](/get-started/writing-on-github/working-with-advanced-formatting/creating-and-highlighting-code-blocks)."
+You can use GeoJSON/TopoJSON syntax to create interactive maps. To create a map, add GeoJSON or TopoJSON inside a fenced code block with the `geojson` or `topojson` syntax identifier. For more information, see "[Creating and highlighting code blocks](/get-started/writing-on-github/working-with-advanced-formatting/creating-and-highlighting-code-blocks)."
 
-### Using geoJSON
+### Using GeoJSON
 
 For example, you can create a simple map:
 
@@ -77,9 +77,9 @@ For example, you can create a simple map:
 
 ![Rendered map](/assets/images/help/writing/fenced-geojson-rendered-map.png)
 
-### Using topoJSON
+### Using TopoJSON
 
-For example, you can create a simple topoJSON map:
+For example, you can create a simple TopoJSON map:
 
 <pre>
 ```topojson
diff --git a/data/glossaries/internal.yml b/data/glossaries/internal.yml
index 750a32af3a7b..6134e83f8d29 100644
--- a/data/glossaries/internal.yml
+++ b/data/glossaries/internal.yml
@@ -208,7 +208,7 @@
   description: A format for describing gem dependencies for Ruby programs.
 - term: GET
   description: A type of method in the REST API
-- term: geoJSON
+- term: GeoJSON
   description: A format for encoding a variety of geographic data structures.
 - term: GitHub Marketplace Developer Agreement
   description: An agreement users sign when using GitHub Marketplace.
@@ -618,7 +618,7 @@
   description: >-
     Can be used in place of a password. Tokens can be personal access tokens,
     OAuth tokens, or API tokens.
-- term: topoJSON
+- term: TopoJSON
   description: An extension of GeoJSON that encodes topology.
 - term: TOTP application
   description: >-