diff --git a/ch07_authorization-authentication.adoc b/ch07_authorization-authentication.adoc
index 6d589706..07ff0049 100644
--- a/ch07_authorization-authentication.adoc
+++ b/ch07_authorization-authentication.adoc
@@ -156,7 +156,7 @@ can produce the +TRUE+ result that signifies a valid ((("scripts", "stack", star
 
 ===== A simple script
 
-Now let's apply what we've learned about scripts and stacks to some simple examples.
+Now let's ((("scripts", "input/output", "examples of", id="script-input-output-example")))((("input scripts", "examples of", id="input-script-example")))((("output scripts", "examples of", id="output-script-example")))apply what we've learned about scripts and stacks to some simple examples.
 
 As we will see in <<simplemath_script>>, the script +2 3 OP_ADD 5 OP_EQUAL+
 demonstrates the arithmetic addition operator +OP_ADD+, adding two
@@ -228,7 +228,7 @@ the next operator:
 
 Try validating the preceding script yourself using pencil and paper.
 When the script execution ends, you should be left with a +TRUE+ value
-on the stack.
+on the ((("scripts", "input/output", "examples of", startref="script-input-output-example")))((("input scripts", "examples of", startref="input-script-example")))((("output scripts", "examples of", startref="output-script-example")))stack.
 
 [[script_exec]]
 ===== Separate execution of output and input scripts