diff --git a/src/AdvancedCalculator.csproj b/src/AdvancedCalculator.csproj
index 6347acd..f1825ea 100644
--- a/src/AdvancedCalculator.csproj
+++ b/src/AdvancedCalculator.csproj
@@ -33,6 +33,9 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
+  <PropertyGroup>
+    <ApplicationIcon>icon.ico</ApplicationIcon>
+  </PropertyGroup>
   <ItemGroup>
     <Reference Include="csmic, Version=1.1.4.0, Culture=neutral, processorArchitecture=MSIL">
       <HintPath>packages\csmic.1.1.4\lib\net40\csmic.dll</HintPath>
@@ -105,5 +108,11 @@
   <ItemGroup>
     <None Include="App.config" />
   </ItemGroup>
+  <ItemGroup>
+    <Resource Include="calculator-variant-black.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <Resource Include="icon.ico" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>
\ No newline at end of file
diff --git a/src/FunctionDefinitonItem.cs b/src/FunctionDefinitonItem.cs
index 1d02047..7a30815 100644
--- a/src/FunctionDefinitonItem.cs
+++ b/src/FunctionDefinitonItem.cs
@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using System.Collections.Generic;
 
 namespace AdvancedCalculator
 {
@@ -14,29 +10,31 @@ namespace AdvancedCalculator
 
         public string FunctionDescription { get; private set; }
 
+        public string Icon { get; private set; }
+
         public IEnumerable<KeyValuePair<string, string>> FunctionArguments { get; private set; }
 
         public static IEnumerable<FunctionDefinitonItem> DefinedFunctions
         {
             get
             {
-                yield return new FunctionDefinitonItem() { FunctionName = "sin", FunctionDescription = "Returns the sine value of a given expression.", FunctionArguments = new[] { new KeyValuePair<string, string>("expression", "An expression to compute.") } };
-                yield return new FunctionDefinitonItem() { FunctionName = "cos", FunctionDescription = "Returns the cosine value of a given expression.", FunctionArguments = new[] { new KeyValuePair<string, string>("expression", "An expression to compute.") } };
-                yield return new FunctionDefinitonItem() { FunctionName = "tan", FunctionDescription = "Returns the tangent value of a given expression.", FunctionArguments = new[] { new KeyValuePair<string, string>("expression", "An expression to compute.") } };
-                yield return new FunctionDefinitonItem() { FunctionName = "round", FunctionDescription = "Rounds an expression to the nearest whole number.", FunctionArguments = new[] { new KeyValuePair<string, string>("expression", "An expression to compute.") } };
-                yield return new FunctionDefinitonItem() { FunctionName = "sqrt", FunctionDescription = "Returns the square root of a given expression.", FunctionArguments = new[] { new KeyValuePair<string, string>("expression", "An expression to compute.") } };
-                yield return new FunctionDefinitonItem() { FunctionName = "abs", FunctionDescription = "Returns the absolute value of a given expression.", FunctionArguments = new[] { new KeyValuePair<string, string>("expression", "An expression to compute.") } };
-                yield return new FunctionDefinitonItem() { FunctionName = "exp", FunctionDescription = "Returns the constant e to a given power.", FunctionArguments = new[] { new KeyValuePair<string, string>("power", "An expression to compute.") } };
-                yield return new FunctionDefinitonItem() { FunctionName = "log", FunctionDescription = "Returns the log of the first expression to the base of the second expression.", FunctionArguments = new[] { new KeyValuePair<string, string>("value", "An expression to compute."), new KeyValuePair<string, string>("base", "An expression to compute.") } };
-                yield return new FunctionDefinitonItem() { FunctionName = "precision", FunctionDescription = "Returns the value of expression1 to a given precision. For example, precision(12.3456789, 4) will return 12.3456.", FunctionArguments = new[] { new KeyValuePair<string, string>("value", "An expression to compute."), new KeyValuePair<string, string>("precision", "An expression to compute.") } };
+                yield return new FunctionDefinitonItem() { FunctionName = "sin", Icon = IconFont.SineWave, FunctionDescription = "Returns the sine value of a given expression.", FunctionArguments = new[] { new KeyValuePair<string, string>("expression", "An expression to compute.") } };
+                yield return new FunctionDefinitonItem() { FunctionName = "cos", Icon = IconFont.CosineWave, FunctionDescription = "Returns the cosine value of a given expression.", FunctionArguments = new[] { new KeyValuePair<string, string>("expression", "An expression to compute.") } };
+                yield return new FunctionDefinitonItem() { FunctionName = "tan", Icon = IconFont.MathTan, FunctionDescription = "Returns the tangent value of a given expression.", FunctionArguments = new[] { new KeyValuePair<string, string>("expression", "An expression to compute.") } };
+                yield return new FunctionDefinitonItem() { FunctionName = "round", Icon = IconFont.RoundedCorner, FunctionDescription = "Rounds an expression to the nearest whole number.", FunctionArguments = new[] { new KeyValuePair<string, string>("expression", "An expression to compute.") } };
+                yield return new FunctionDefinitonItem() { FunctionName = "sqrt", Icon = IconFont.SquareRoot, FunctionDescription = "Returns the square root of a given expression.", FunctionArguments = new[] { new KeyValuePair<string, string>("expression", "An expression to compute.") } };
+                yield return new FunctionDefinitonItem() { FunctionName = "abs", Icon = IconFont.PlusCircle, FunctionDescription = "Returns the absolute value of a given expression.", FunctionArguments = new[] { new KeyValuePair<string, string>("expression", "An expression to compute.") } };
+                yield return new FunctionDefinitonItem() { FunctionName = "exp", Icon = IconFont.AlphaECircle, FunctionDescription = "Returns the constant e to a given power.", FunctionArguments = new[] { new KeyValuePair<string, string>("power", "An expression to compute.") } };
+                yield return new FunctionDefinitonItem() { FunctionName = "log", Icon = IconFont.MathLog, FunctionDescription = "Returns the log of the first expression to the base of the second expression.", FunctionArguments = new[] { new KeyValuePair<string, string>("value", "An expression to compute."), new KeyValuePair<string, string>("base", "An expression to compute.") } };
+                yield return new FunctionDefinitonItem() { FunctionName = "precision", Icon = IconFont.DecimalIncrease, FunctionDescription = "Returns the value of expression1 to a given precision. For example, precision(12.3456789, 4) will return 12.3456.", FunctionArguments = new[] { new KeyValuePair<string, string>("value", "An expression to compute."), new KeyValuePair<string, string>("precision", "An expression to compute.") } };
             }
         }
 
-        #endregion
+        #endregion Properties
 
         private FunctionDefinitonItem()
         {
             //
         }
     }
-}
+}
\ No newline at end of file
diff --git a/src/MainWindow.xaml b/src/MainWindow.xaml
index 7564aa5..0bda146 100644
--- a/src/MainWindow.xaml
+++ b/src/MainWindow.xaml
@@ -5,7 +5,7 @@
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:AdvancedCalculator"
         mc:Ignorable="d"
-        Title="MainWindow" Height="450" Width="800">
+        Title="Advanced Calculator" Height="450" Width="800" Icon="calculator-variant-black.png">
     <Grid>
         <Grid.ColumnDefinitions>
             <ColumnDefinition Width="*" />
@@ -19,19 +19,19 @@
             <ListView Grid.Row="0" x:Name="lvVariableList" HorizontalContentAlignment="Stretch">
                 <ListView.ItemTemplate>
                     <DataTemplate>
-                        <StackPanel Orientation="Vertical">
-                            <Grid HorizontalAlignment="Stretch">
-                                <Grid.ColumnDefinitions>
-                                    <ColumnDefinition Width="*" />
-                                    <ColumnDefinition Width="Auto" />
-                                </Grid.ColumnDefinitions>
-                                <TextBlock Grid.Column="0" Text="{Binding VariableName}" FontWeight="Bold" />
-                                <StackPanel Grid.Column="1">
-                                    <TextBlock Text="{Binding Value}" />
-                                    <TextBlock Visibility="{Binding ExpressionVisibility}" Text="{Binding ExpressionComputation}" FontStyle="Italic" />
-                                </StackPanel>
-                            </Grid>
-                        </StackPanel>
+                        <Grid HorizontalAlignment="Stretch">
+                            <Grid.ColumnDefinitions>
+                                <ColumnDefinition Width="{Binding Path=ActualHeight, RelativeSource={RelativeSource AncestorType=Grid}}" />
+                                <ColumnDefinition Width="*" />
+                                <ColumnDefinition Width="Auto" />
+                            </Grid.ColumnDefinitions>
+                            <TextBlock Grid.Column="0" FontFamily="{StaticResource MDI}" FontSize="24" Text="{Binding Icon}" VerticalAlignment="Center" />
+                            <TextBlock Grid.Column="1" Text="{Binding VariableName}" FontWeight="Bold" />
+                            <StackPanel Grid.Column="2">
+                                <TextBlock Text="{Binding Value}" />
+                                <TextBlock Visibility="{Binding ExpressionVisibility}" Text="{Binding ExpressionComputation}" FontStyle="Italic" />
+                            </StackPanel>
+                        </Grid>
                     </DataTemplate>
                 </ListView.ItemTemplate>
             </ListView>
@@ -51,7 +51,10 @@
                 <ListView.ItemTemplate>
                     <DataTemplate>
                         <StackPanel>
-                            <TextBlock Text="{Binding FunctionName}" FontWeight="Bold" />
+                            <StackPanel Orientation="Horizontal">
+                                <TextBlock FontFamily="{StaticResource MDI}" Text="{Binding Icon}" Margin="5,0" />
+                                <TextBlock Text="{Binding FunctionName}" FontWeight="Bold" />
+                            </StackPanel>
                             <TextBlock Text="{Binding FunctionDescription}" FontStyle="Italic" />
                             <ListView Margin="5,0" ItemsSource="{Binding FunctionArguments}" BorderThickness="0">
                                 <ListView.ItemContainerStyle>
@@ -80,7 +83,7 @@
                 </ListView.ItemTemplate>
             </ListView>
         </Grid>
-        <GridSplitter Grid.Column="0" HorizontalAlignment="Right" Height="100" VerticalAlignment="Center" Width="5"/>
+        <GridSplitter Grid.Column="0" HorizontalAlignment="Right" Height="100" VerticalAlignment="Center" Width="5" />
         <Grid Grid.Column="1">
             <Grid.RowDefinitions>
                 <RowDefinition Height="*" />
@@ -89,15 +92,22 @@
             <ListView Grid.Row="0" x:Name="lvHistory">
                 <ListView.ItemsPanel>
                     <ItemsPanelTemplate>
-                        <VirtualizingStackPanel VerticalAlignment="Bottom"/>
+                        <VirtualizingStackPanel VerticalAlignment="Bottom" />
                     </ItemsPanelTemplate>
                 </ListView.ItemsPanel>
                 <ListView.ItemTemplate>
                     <DataTemplate>
-                        <StackPanel>
-                            <TextBlock Text="{Binding Input}" />
-                            <TextBlock Text="{Binding Output}" FontWeight="Bold" />
-                        </StackPanel>
+                        <Grid>
+                            <Grid.ColumnDefinitions>
+                                <ColumnDefinition Width="{Binding Path=ActualHeight, RelativeSource={RelativeSource AncestorType=Grid}}" />
+                                <ColumnDefinition Width="*" />
+                            </Grid.ColumnDefinitions>
+                            <TextBlock FontFamily="{StaticResource MDI}" Text="{x:Static local:IconFont.ArrowRightDropCircle}" FontSize="24" VerticalAlignment="Center" />
+                            <StackPanel Grid.Column="1">
+                                <TextBlock Text="{Binding Input}" />
+                                <TextBlock Text="{Binding Output}" FontWeight="Bold" />
+                            </StackPanel>
+                        </Grid>
                     </DataTemplate>
                 </ListView.ItemTemplate>
             </ListView>
@@ -113,4 +123,4 @@
             </Grid>
         </Grid>
     </Grid>
-</Window>
+</Window>
\ No newline at end of file
diff --git a/src/MainWindow.xaml.cs b/src/MainWindow.xaml.cs
index 8defa41..e326051 100644
--- a/src/MainWindow.xaml.cs
+++ b/src/MainWindow.xaml.cs
@@ -1,18 +1,9 @@
 using csmic;
-using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
 using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
 
 namespace AdvancedCalculator
 {
@@ -42,11 +33,12 @@ namespace AdvancedCalculator
                 {
                     this.interpreter.Interpret(input);
                     this.historyItems.Add(new HistoryItem() { Input = input, Output = this.interpreter.Output });
-                    this.variableItems = this.interpreter.Variables.Select(kp => new VariableItem() { VariableName = kp.Key, Value = kp.Value.Value.ToString(), ExpressionVisibility = kp.Value.Type == VariableType.Equation ? Visibility.Visible : Visibility.Hidden, ExpressionComputation = "" }).ToList();
+                    this.variableItems = this.interpreter.Variables.Select(kp => new VariableItem() { VariableName = kp.Key, Value = kp.Value.Value.ToString(), ExpressionVisibility = kp.Value.Type == VariableType.Equation ? Visibility.Visible : Visibility.Hidden, ExpressionComputation = "", Icon = IconFont.Variable }).ToList();
                     foreach(var expressionVariable in this.variableItems.Where(v => v.ExpressionVisibility == Visibility.Visible))
                     {
                         this.interpreter.Interpret(expressionVariable.Value);
                         expressionVariable.ExpressionComputation = this.interpreter.Output;
+                        expressionVariable.Icon = IconFont.Function;
                     }
                 });
 
@@ -75,4 +67,4 @@ namespace AdvancedCalculator
             }
         }
     }
-}
+}
\ No newline at end of file
diff --git a/src/VariableItem.cs b/src/VariableItem.cs
index ea8f597..226907d 100644
--- a/src/VariableItem.cs
+++ b/src/VariableItem.cs
@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows;
+using System.Windows;
 
 namespace AdvancedCalculator
 {
@@ -13,12 +8,14 @@ namespace AdvancedCalculator
 
         public string VariableName { get; set; }
 
+        public string Icon { get; set; }
+
         public string Value { get; set; }
 
         public Visibility ExpressionVisibility { get; set; }
 
         public string ExpressionComputation { get; set; }
 
-        #endregion
+        #endregion Properties
     }
-}
+}
\ No newline at end of file
diff --git a/src/calculator-variant-black.png b/src/calculator-variant-black.png
new file mode 100644
index 0000000..f70daac
Binary files /dev/null and b/src/calculator-variant-black.png differ
diff --git a/src/icon.ico b/src/icon.ico
new file mode 100644
index 0000000..1494c62
Binary files /dev/null and b/src/icon.ico differ