diff --git a/SBIN/SHELL.S.txt b/SBIN/SHELL.S.txt
index 01cf46e6..535e4b13 100644
--- a/SBIN/SHELL.S.txt
+++ b/SBIN/SHELL.S.txt
@@ -344,6 +344,18 @@ ENV.PWD			.AZ "PWD"
 ENV.PS1			.AZ "PS1"
 ENV.HOME		.AZ "HOME"
 *--------------------------------------
+* https://www.tldp.org/LDP/abs/html/io-redirection.html
+*--------------------------------------
+CMD.			.AZ "&"
+				.AZ "|"
+				.AZ "<"
+				.AZ ">"
+				.AZ ">>"
+				.AZ "1>"
+				.AZ "1>>"
+				.AZ "2>"
+				.AZ "2>>"
+*--------------------------------------
 INTCMDS			.AZ "CD"
 				.AZ "DATE"
 				.AZ "ECHO"