diff --git a/gaseous-identifier/Objects/RomSignatureObject.cs b/gaseous-identifier/Objects/RomSignatureObject.cs
index 4843e4e..6d7482c 100644
--- a/gaseous-identifier/Objects/RomSignatureObject.cs
+++ b/gaseous-identifier/Objects/RomSignatureObject.cs
@@ -10,33 +10,33 @@ namespace gaseous_identifier.objects
     /// </summary>
 	public class RomSignatureObject
     {
-        public string Name { get; set; }
-        public string Description { get; set; }
-        public string Category { get; set; }
-        public string Version { get; set; }
-        public string Author { get; set; }
-        public string Email { get; set; }
-        public string Homepage { get; set; }
+        public string? Name { get; set; }
+        public string? Description { get; set; }
+        public string? Category { get; set; }
+        public string? Version { get; set; }
+        public string? Author { get; set; }
+        public string? Email { get; set; }
+        public string? Homepage { get; set; }
         public Uri? Url { get; set; }
-        public string SourceType { get; set; }
+        public string? SourceType { get; set; }
 
-        public List<Game> Games { get; set; }
+        public List<Game> Games { get; set; } = new List<Game>();
 
         public class Game
         {
-            public string Name { get; set; }
-            public string Description { get; set; }
-            public string Year { get; set; }
-            public string Publisher { get; set; }
+            public string? Name { get; set; }
+            public string? Description { get; set; }
+            public string? Year { get; set; }
+            public string? Publisher { get; set; }
             public DemoTypes Demo { get; set; }
-            public string System { get; set; }
-            public string SystemVariant { get; set; }
-            public string Video { get; set; }
+            public string? System { get; set; }
+            public string? SystemVariant { get; set; }
+            public string? Video { get; set; }
             public KeyValuePair<string, string> Country { get; set; }
             public KeyValuePair<string, string> Language { get; set; }
             public KeyValuePair<string, string> Copyright { get; set; }
             public KeyValuePair<string, string> DevelopmentStatus { get; set; }
-            public List<Rom> Roms { get; set; }
+            public List<Rom> Roms { get; set; } = new List<Rom>();
 
             public enum DemoTypes
             {
@@ -50,17 +50,17 @@ namespace gaseous_identifier.objects
 
             public class Rom
             {
-                public string Name { get; set; }
-                public UInt64 Size { get; set; }
-                public string Crc { get; set; }
-                public string Md5 { get; set; }
-                public string Sha1 { get; set; }
+                public string? Name { get; set; }
+                public UInt64? Size { get; set; }
+                public string? Crc { get; set; }
+                public string? Md5 { get; set; }
+                public string? Sha1 { get; set; }
 
-                public string flags { get; set; }
+                public string? flags { get; set; }
 
                 public RomTypes RomType { get; set; }
-                public string RomTypeMedia { get; set; }
-                public string MediaLabel { get; set; }
+                public string? RomTypeMedia { get; set; }
+                public string? MediaLabel { get; set; }
 
                 public enum RomTypes
                 {
diff --git a/gaseous-identifier/Program.cs b/gaseous-identifier/Program.cs
index 28b556b..bfdfe5a 100644
--- a/gaseous-identifier/Program.cs
+++ b/gaseous-identifier/Program.cs
@@ -49,8 +49,10 @@ foreach (string commandLineArg in commandLineArgs)
 scanPath = Path.GetFullPath(scanPath);
 Console.WriteLine("ROM search path: " + scanPath);
 
-System.Collections.ArrayList TOSEC = new System.Collections.ArrayList();
-List<gaseous_identifier.objects.RomSignatureObject> tosecLists = new List<gaseous_identifier.objects.RomSignatureObject>();
+List<gaseous_identifier.objects.RomSignatureObject> romSignatures = new List<gaseous_identifier.objects.RomSignatureObject>();
+System.Collections.ArrayList availablePlatforms = new System.Collections.ArrayList();
+
+// load TOSEC XML files
 if (tosecXML != null && tosecXML.Length > 0)
 {
     tosecXML = Path.GetFullPath(tosecXML);
@@ -58,27 +60,43 @@ if (tosecXML != null && tosecXML.Length > 0)
     Console.WriteLine("TOSEC XML search path: " + tosecXML);
 
     string[] tosecPathContents = Directory.GetFiles(tosecXML);
-    foreach (string tosecXMLFile in tosecPathContents)
+    int lastCLILineLength = 0;
+    for (UInt16 i = 0; i < tosecPathContents.Length; ++i)
     {
+        string tosecXMLFile = tosecPathContents[i];
+
         gaseous_identifier.classes.TosecParser tosecParser = new gaseous_identifier.classes.TosecParser();
         gaseous_identifier.objects.RomSignatureObject tosecObject = tosecParser.Parse(tosecXMLFile);
 
-        Console.Write(".");
-        tosecLists.Add(tosecObject);
+        string statusOutput = i + " / " + tosecPathContents.Length + " : " + Path.GetFileName(tosecXMLFile);
+        Console.Write("\r " + statusOutput.PadRight(lastCLILineLength, ' ') + "\r");
+        lastCLILineLength = statusOutput.Length;
+
+        foreach (gaseous_identifier.objects.RomSignatureObject.Game gameRom in tosecObject.Games)
+        {
+            if (!availablePlatforms.Contains(gameRom.System))
+            {
+                availablePlatforms.Add(gameRom.System);
+            }
+        }
+
+        romSignatures.Add(tosecObject);
     }
     Console.WriteLine("");
 } else
 {
-    Console.WriteLine("TOSEC is disabled, title matching will be by file name only.");
+    Console.WriteLine("TOSEC is disabled.");
 }
-Console.WriteLine(tosecLists.Count + " TOSEC files loaded");
+Console.WriteLine(romSignatures.Count + " TOSEC files loaded");
 
-if (tosecLists.Count > 0)
+// Summarise signatures
+if (availablePlatforms.Count > 0)
 {
-    Console.WriteLine("TOSEC lists available:");
-    foreach (gaseous_identifier.objects.RomSignatureObject tosecList in tosecLists)
+    availablePlatforms.Sort();
+    Console.WriteLine("Platforms loaded:");
+    foreach (string platform in availablePlatforms)
     {
-        Console.WriteLine(" * " + tosecList.Name);
+        Console.WriteLine(" * " + platform);
     }
 }
 
@@ -99,7 +117,7 @@ foreach (string romFile in romPathContents)
     string sha1Hash = BitConverter.ToString(md5HashByte).Replace("-", "").ToLowerInvariant();
 
     bool gameFound = false;
-    foreach (gaseous_identifier.objects.RomSignatureObject tosecList in tosecLists)
+    foreach (gaseous_identifier.objects.RomSignatureObject tosecList in romSignatures)
     {
         foreach (gaseous_identifier.objects.RomSignatureObject.Game gameObject in tosecList.Games)
         {