diff --git a/console/conference/src/main/java/tech/uom/demo/conference/_03_ParseMassAndHeightFromString.java b/console/conference/src/main/java/tech/uom/demo/conference/_03a_ParseMassAndHeightFromString.java
similarity index 96%
rename from console/conference/src/main/java/tech/uom/demo/conference/_03_ParseMassAndHeightFromString.java
rename to console/conference/src/main/java/tech/uom/demo/conference/_03a_ParseMassAndHeightFromString.java
index 96e62f93..a6a829c8 100644
--- a/console/conference/src/main/java/tech/uom/demo/conference/_03_ParseMassAndHeightFromString.java
+++ b/console/conference/src/main/java/tech/uom/demo/conference/_03a_ParseMassAndHeightFromString.java
@@ -28,7 +28,7 @@
 
 import tech.units.indriya.quantity.Quantities;
 
-public class _03_ParseMassAndHeightFromString {
+public class _03a_ParseMassAndHeightFromString {
 
 	public static void main(String[] args) {
 		final Quantity<?> mass = Quantities.getQuantity("88 kg");
@@ -40,6 +40,6 @@ public static void main(String[] args) {
 		final Quantity<?> bmi = mass.divide(height).divide(height);
 		System.out.println(bmi);
 		final Quantity<?> bmi2 = mass.divide(height).divide(height2);
-		System.out.println(bmi2);
+		//System.out.println(bmi2);
 	}
 }
\ No newline at end of file
diff --git a/console/conference/src/main/java/tech/uom/demo/conference/_04_ParseMassAndHeightFromCommandLine.java b/console/conference/src/main/java/tech/uom/demo/conference/_03b_ParseMassAndHeightFromCommandLine.java
similarity index 97%
rename from console/conference/src/main/java/tech/uom/demo/conference/_04_ParseMassAndHeightFromCommandLine.java
rename to console/conference/src/main/java/tech/uom/demo/conference/_03b_ParseMassAndHeightFromCommandLine.java
index 63fc0060..404ed85c 100644
--- a/console/conference/src/main/java/tech/uom/demo/conference/_04_ParseMassAndHeightFromCommandLine.java
+++ b/console/conference/src/main/java/tech/uom/demo/conference/_03b_ParseMassAndHeightFromCommandLine.java
@@ -28,7 +28,7 @@
 
 import tech.units.indriya.quantity.Quantities;
 
-public class _04_ParseMassAndHeightFromCommandLine {
+public class _03b_ParseMassAndHeightFromCommandLine {
 
 	public static void main(String[] args) {
 		final Quantity<?> mass = Quantities.getQuantity(args[0]);
diff --git a/console/conference/src/main/java/tech/uom/demo/conference/_05_DefineBmiQuantity.java b/console/conference/src/main/java/tech/uom/demo/conference/_04a_DefineBmiQuantity.java
similarity index 98%
rename from console/conference/src/main/java/tech/uom/demo/conference/_05_DefineBmiQuantity.java
rename to console/conference/src/main/java/tech/uom/demo/conference/_04a_DefineBmiQuantity.java
index d35d2946..08c2bbd7 100644
--- a/console/conference/src/main/java/tech/uom/demo/conference/_05_DefineBmiQuantity.java
+++ b/console/conference/src/main/java/tech/uom/demo/conference/_04a_DefineBmiQuantity.java
@@ -28,7 +28,7 @@
 
 import tech.units.indriya.quantity.Quantities;
 
-public class _05_DefineBmiQuantity {
+public class _04a_DefineBmiQuantity {
 
 	public static void main(String[] args) {
 		final Quantity<?> mass = Quantities.getQuantity("88 kg");
diff --git a/console/conference/src/main/java/tech/uom/demo/conference/_06_DefineBmiUnit.java b/console/conference/src/main/java/tech/uom/demo/conference/_04b_DefineBmiUnit.java
similarity index 98%
rename from console/conference/src/main/java/tech/uom/demo/conference/_06_DefineBmiUnit.java
rename to console/conference/src/main/java/tech/uom/demo/conference/_04b_DefineBmiUnit.java
index fcd50922..2ddda936 100644
--- a/console/conference/src/main/java/tech/uom/demo/conference/_06_DefineBmiUnit.java
+++ b/console/conference/src/main/java/tech/uom/demo/conference/_04b_DefineBmiUnit.java
@@ -32,7 +32,7 @@
 import tech.units.indriya.unit.AlternateUnit;
 import tech.units.indriya.unit.Units;
 
-public class _06_DefineBmiUnit {
+public class _04b_DefineBmiUnit {
 
 	public static void main(String[] args) {
 		final Quantity<?> mass = Quantities.getQuantity("88 kg");
diff --git a/console/conference/src/main/java/tech/uom/demo/conference/_07_DetectMassAndHeight.java b/console/conference/src/main/java/tech/uom/demo/conference/_05_DetectMassAndHeight.java
similarity index 98%
rename from console/conference/src/main/java/tech/uom/demo/conference/_07_DetectMassAndHeight.java
rename to console/conference/src/main/java/tech/uom/demo/conference/_05_DetectMassAndHeight.java
index 99269a05..c1f955a9 100644
--- a/console/conference/src/main/java/tech/uom/demo/conference/_07_DetectMassAndHeight.java
+++ b/console/conference/src/main/java/tech/uom/demo/conference/_05_DetectMassAndHeight.java
@@ -10,7 +10,7 @@
 import tech.units.indriya.unit.UnitDimension;
 import tech.units.indriya.unit.Units;
 
-public class _07_DetectMassAndHeight {
+public class _05_DetectMassAndHeight {
 
 	public static void main(String[] args) {
 		final Quantity<?> first = Quantities.getQuantity("188 cm");