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diff --git a/adoc/p_or.adoc b/adoc/p_or.adoc
index ab5cbe7..7d8401f 100644
--- a/adoc/p_or.adoc
+++ b/adoc/p_or.adoc
@@ -1,9 +1,15 @@
+// logic.asm:	WORD p_or, 'OR',fasm
+
 anchor:p_or[]
 
-Word: OR
-----------
+=== Word: OR
+
+....
+Data stack: ( v1 v2 -- v3 )
+....
+
+"OR" is a function word that replaces a value pair with their bitwise
+disjunction; each bit is 1 if the corresponding bits of any operand
+is 1 and 0 if not.
 
-----
-logic.asm:	WORD p_or, 'OR',fasm
-----