diff --git a/extensions/openpower-pels/registry/README.md b/extensions/openpower-pels/registry/README.md
index 1955ad8..27c0044 100644
--- a/extensions/openpower-pels/registry/README.md
+++ b/extensions/openpower-pels/registry/README.md
@@ -329,6 +329,16 @@
 
 There is room for up to 10 callouts in a PEL.
 
+The callouts based on system type can be added in two ways, by using either a
+key called `System` or by `Systems`.
+
+The `System` key will accept the system name as a string and the user can add
+the callouts specific to that system under the `System`.
+
+Suppose if multiple systems have same callouts, the `Systems` key can be used.
+The `Systems` can accept the system names as an array of strings and the list of
+callouts common to those systems can be listed under the key.
+
 Available maintenance procedures are listed [here][1] and in the source code
 [here][2].
 
@@ -373,10 +383,61 @@
 
 ```
 
-The above example shows that on system 'system1', the FRU at location P1-C1 will
+The above example shows that on system `system1`, the FRU at location P1-C1 will
 be called out with a priority of high, and the FRU at P1 with a priority of low.
 On every other system, the maintenance procedure BMC0002 is called out.
 
+#### Callouts example based on the Systems type
+
+```json
+"Callouts":
+[
+    {
+        "Systems": ["system1", "system2"],
+        "CalloutList":
+        [
+            {
+                "Priority": "high",
+                "LocCode": "P1-C1"
+            },
+            {
+                "Priority": "low",
+                "LocCode": "P1"
+            }
+        ]
+    },
+    {
+        "System": "system1",
+        "CalloutList":
+        [
+            {
+                "Priority": "low",
+                "SymbolicFRU": "service_docs"
+            },
+            {
+                "Priority": "low",
+                "SymbolicFRUTrusted": "air_mover",
+                "UseInventoryLocCode": true
+            }
+        ]
+    },
+    {
+        "CalloutList":
+        [
+            {
+                "Priority": "medium",
+                "Procedure": "BMC0001"
+            }
+        ]
+    }
+]
+```
+
+The above example shows that on `system1`, the FRU at location P1-C1, P1,
+service_docs and air_mover will be called out. For `system2`, the FRU at
+location P1-C1, P1 will be called out. On every other system, the maintenance
+procedure BMC0001 is called out.
+
 #### Callouts example based on an AdditionalData field
 
 ```json
diff --git a/extensions/openpower-pels/registry/schema/schema.json b/extensions/openpower-pels/registry/schema/schema.json
index 429d3bf..d4fea9d 100644
--- a/extensions/openpower-pels/registry/schema/schema.json
+++ b/extensions/openpower-pels/registry/schema/schema.json
@@ -642,6 +642,15 @@
             "minLength": 1
         },
 
+        "systems": {
+            "description": "The Systems key can be defined and can be used to keep the name of the systems as an array of string if the systems possess same callout list.",
+            "type": "array",
+            "items": {
+                "type": "string"
+            },
+            "minItems": 1
+        },
+
         "callouts": {
             "description": "This contains callouts that can vary based on system type.  Each entry contains an optional System property and a required CalloutList property.  If the System property is left out it indicates that the CalloutList callouts are valid for every system type, unless there is another Callouts entry that has a matching System property, in which case that entry is valid.",
             "type": "array",
@@ -650,11 +659,22 @@
 
                 "properties": {
                     "System": { "$ref": "#/definitions/system" },
+                    "Systems": { "$ref": "#/definitions/systems" },
                     "CalloutList": { "$ref": "#/definitions/calloutList" }
                 },
-                "required": ["CalloutList"],
                 "additionalProperties": false
             },
+            "anyOf": [
+                {
+                    "required": ["System", "CalloutList"]
+                },
+                {
+                    "required": ["Systems", "CalloutList"]
+                },
+                {
+                    "required": ["CalloutList"]
+                }
+            ],
             "minItems": 1,
             "maxItems": 10,
 
@@ -665,6 +685,10 @@
                         "CalloutList": [{ "Priority": "high", "LocCode": "P1" }]
                     },
                     {
+                        "Systems": ["system1", "system2"],
+                        "CalloutList": [{ "Priority": "low", "LocCode": "P2" }]
+                    },
+                    {
                         "CalloutList": [
                             { "Priority": "high", "Procedure": "NEXTLVL" }
                         ]