diff --git a/SabreTools.Serialization/Extensions/ISO9660.cs b/SabreTools.Serialization/Extensions/ISO9660.cs
index 6108c2bd..289bba22 100644
--- a/SabreTools.Serialization/Extensions/ISO9660.cs
+++ b/SabreTools.Serialization/Extensions/ISO9660.cs
@@ -1,5 +1,6 @@
 using System;
 using SabreTools.Data.Models.ISO9660;
+using SabreTools.IO.Extensions;
 
 namespace SabreTools.Data.Extensions
 {
@@ -57,6 +58,36 @@ namespace SabreTools.Data.Extensions
             return Array.TrueForAll(bvd.Reserved653Bytes, b => b == 0x00);
         }
 
+        /// <summary>
+        /// Determine if a volume descriptor was written by ImgBurn
+        /// </summary>
+        /// <param name="bvd">Volume descriptor containing the application use bytes</param>
+        /// <returns>True if the descriptor was written by ImgBurn, false otherwise</returns>
+        public static bool IsImgBurn(this BaseVolumeDescriptor? bvd)
+        {
+            // Invalid volume descriptor
+            if (bvd?.ApplicationUse == null)
+                return false;
+
+            // "ImgBurn"
+            return bvd.ApplicationUse.StartsWith([0x49, 0x6D, 0x67, 0x42, 0x75, 0x72, 0x6E]);
+        }
+
+        /// <summary>
+        /// Determine if a volume descriptor was written by UltraISO
+        /// </summary>
+        /// <param name="bvd">Volume descriptor containing the application use bytes</param>
+        /// <returns>True if the descriptor was written by UltraISO, false otherwise</returns>
+        public static bool IsUltraISO(this BaseVolumeDescriptor? bvd)
+        {
+            // Invalid volume descriptor
+            if (bvd?.ApplicationUse == null)
+                return false;
+
+            // "ULTRAISO"
+            return bvd.ApplicationUse.StartsWith([0x55, 0x4C, 0x54, 0x52, 0x41, 0x49, 0x53, 0x4F]);
+        }
+
         /// <summary>
         /// Indicates if an array contains all ASCII numeric digits
         /// </summary>