1 files changed, 12 insertions, 1 deletions
diff --git a/unix.mdwn b/unix.mdwn
index 3cfe7771..8694f7b0 100644
--- a/unix.mdwn
+++ b/unix.mdwn
@@ -13,6 +13,17 @@ License|/fdl]]."]]"""]]
 *UNIX* is a [[kernel]] implementation.
 
 
+# Concepts
+
+  * [[file_descriptor]]
+
+  * [[process]]
+
+  * [[signal]]
+
+  * [[system_call]]
+
+
 # External
 
   * Wikipedia page about [[!wikipedia UNIX]].
@@ -31,7 +42,7 @@ License|/fdl]]."]]"""]]
     to the `open` [[system_call]].
 
     In {{$2010_brown_ghosts_3}}, he deals with *unfixable designs*, such as
-    [[UNIX signals|glibc/signals]] and the *UNIX permission model* (which is
+    UNIX [[signal]]s and the *UNIX permission model* (which is
     clearly inferior to a [[capability]]-based system).
 
   * [*UNIX File Permissions*](http://www.greenend.org.uk/rjk/2004/perms.html)