diff --git a/content/ai-system/_index.md b/content/ai-system/_index.md
index f6e256b..f955a4f 100644
--- a/content/ai-system/_index.md
+++ b/content/ai-system/_index.md
@@ -1,7 +1,10 @@
 +++
-title = "AIsys"
+title = "AI Systems & Infrastructure"
 sort_by = "date"
 paginate_by = 10
+
+[extra]
+abbr = "AIsys"
 +++
 
 Basics of streamlined interaction with AI systems, peripherals that enable such interaction, and deployment of AI systems on real-world infrastructure.
diff --git a/content/dl4traj/_index.md b/content/dl4traj/_index.md
index 79bb750..7240ec2 100644
--- a/content/dl4traj/_index.md
+++ b/content/dl4traj/_index.md
@@ -1,7 +1,10 @@
 +++
-title = "DL4traj"
+title = "Deep Learning for Trajectory"
 sort_by = "date"
 paginate_by = 10
+
+[extra]
+abbr = "DL4traj"
 +++
 
 Deep learning approaches for analysis and utilization of spatiotemporal trajectories.
diff --git a/content/homelab/_index.md b/content/homelab/_index.md
index 413ea93..ecef556 100644
--- a/content/homelab/_index.md
+++ b/content/homelab/_index.md
@@ -2,6 +2,9 @@
 title = "Homelab"
 sort_by = "date"
 paginate_by = 10
+
+[extra]
+abbr = "Homelab"
 +++
 
 My experience and stories tinkering with home servers, personal cloud, etc.
diff --git a/content/ml-tech/_index.md b/content/ml-tech/_index.md
index 1dad752..7a7e205 100644
--- a/content/ml-tech/_index.md
+++ b/content/ml-tech/_index.md
@@ -1,7 +1,10 @@
 +++
-title = "MLtech"
+title = "Machine Learning Techniques"
 sort_by = "date"
 paginate_by = 10
+
+[extra]
+abbr = "MLtech"
 +++
 
 Investigation of certain topics of machine learning techniques and discussion of their motivation, design, and applications.
diff --git a/templates/base.html b/templates/base.html
index 81a23d0..ad6c122 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -32,7 +32,7 @@
             {% set root = get_section(path="_index.md") %}
             {% for path in root.subsections | sort %}
             {% set s = get_section(path=path) %}
-            <a href="{{ s.permalink }}">{{ s.title }}</a>
+            <a href="{{ s.permalink }}">{{ s.extra.abbr | default(value=s.title) }}</a>
             {% endfor %}
         </nav>
     </header>