diff --git a/computer-system.md b/computer-system.md
new file mode 100644
index 000000000..edbb313b4
--- /dev/null
+++ b/computer-system.md
@@ -0,0 +1,9 @@
+# computer system
+
+- [[plato]]
+- [[agora]]
+
+[//begin]: # "Autogenerated link references for markdown compatibility"
+[plato]: plato "Plato"
+[agora]: agora "Agora"
+[//end]: # "Autogenerated link references"
\ No newline at end of file
diff --git a/plato.md b/plato.md
index 665dc2e03..44feab342 100644
--- a/plato.md
+++ b/plato.md
@@ -1,8 +1,15 @@
 # Plato
 
-- [[go]] en.wikipedia.org/wiki/Plato
+- a [[person]]
+  - [[go]] en.wikipedia.org/wiki/Plato
+  - [[philosopher]]
+  - [[role model]]
+  - [[wrote]]
+- a [[computer system]]
+  - [[go]] en.wikipedia.org/PLATO
 
 
 [//begin]: # "Autogenerated link references for markdown compatibility"
+[person]: person "Person"
 [go]: go "Go"
 [//end]: # "Autogenerated link references"
\ No newline at end of file