diff --git a/README.md b/README.md
index 5e6eb90..c673adc 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,8 @@ DEVICE=1
 # 40 = Rauschfilter (Spawns a javafx window)
 # 50 = Mandelbrot (Spawns a javafx window)
 # 60 = RGBHistogramm (Spawns a javafx window)
+# 70 = Radixsort
+# 80 = Matrix Multiplication
 # DEFAULT = 0
 TARGET=31
 
@@ -25,6 +27,8 @@ TARGET=31
 # Target 4X (N to the left and right of x_0)
 # Target 50 Zoom Factor (20 should be used to get good results)
 # Target 60 filename of a picture (Place in folder $PROJECT_ROOT/pictures/my_pic.jpg) [jpg,bmp,png]
+# Target 70 Array lenth (N)
+# Target 80 Matrices height and width (NxN)
 # DEFAULT = 25 / "lena.bmp"
 MULTI_PARAM=3
 
diff --git a/src/main/java/edu/thi/phga/aparapi_test/App.java b/src/main/java/edu/thi/phga/aparapi_test/App.java
index ead2b2c..1b8ca97 100644
--- a/src/main/java/edu/thi/phga/aparapi_test/App.java
+++ b/src/main/java/edu/thi/phga/aparapi_test/App.java
@@ -130,6 +130,12 @@ public class App {
         System.out.println("Spawning window RGBHistogramm");
         Application.launch(RGBHistogramm.class);
         break;
+      case 70:
+        System.out.println("Radix Sort");
+        RadixSort.start();
+      case 80:
+        System.out.println("Matrix Mult");
+        MatrixMult.start();
     }
   }
 }
diff --git a/src/main/java/edu/thi/phga/aparapi_test/MatrixMult.java b/src/main/java/edu/thi/phga/aparapi_test/MatrixMult.java
new file mode 100644
index 0000000..8edcbd4
--- /dev/null
+++ b/src/main/java/edu/thi/phga/aparapi_test/MatrixMult.java
@@ -0,0 +1,85 @@
+package edu.thi.phga.aparapi_test;
+
+import java.util.Random;
+
+import com.aparapi.Kernel;
+import com.aparapi.Range;
+
+public class MatrixMult {
+  private static int n = App.multiParam;
+  private static int[] a = new Random().ints(n * n, 1, 10).toArray();
+  private static int[] b = new Random().ints(n * n, 1, 10).toArray();
+  private static int[] c = new int[n * n];
+
+  public static void start() {
+
+    Range r = Range.create(App.device, n);
+    MatMulKernel k = new MatMulKernel(a, b, c);
+    k.execute(r);
+
+    if (n < 10) {
+      print();
+    } else {
+      System.out.println("Success: Choose n < 10 to print matrices");
+
+    }
+  }
+
+  private static void print() {
+    for (int i = 0; i < n; i++) {
+      for (int x = 0; x < n; x++) {
+        System.out.printf("%d ", a[i * n + x]);
+      }
+
+      if (i == n/2) {
+        System.out.print(" * ");
+      } else {
+        System.out.print("   ");
+      }
+
+      for (int x = 0; x < n; x++) {
+        System.out.printf("%d ", b[i * n + x]);
+      }
+
+      if (i == n/2) {
+        System.out.print(" = ");
+      } else {
+        System.out.print("   ");
+      }
+
+      for (int x = 0; x < n; x++) {
+        System.out.printf("%d ", c[i * n + x]);
+      }
+      System.out.println("");
+    }
+  }
+
+  private static class MatMulKernel extends Kernel {
+    private int[] a, b, c;
+    MatMulKernel(int[] a, int[] b, int[] c) {
+      this.a = a;
+      this.b = b;
+      this.c = c;
+    }
+
+    @Override public void run() {
+      int i = getGlobalId(0);
+      int size = getGlobalSize();
+
+      for (int j = 0; j < size; j++) {
+        for (int k = 0; k < size; k++) {
+          c[i * size + j] += a[i * size + k] * b[k * size + j];
+        }
+      }
+
+      // int n = getGlobalSize();
+      // int i = getGlobalId();
+
+      // for (int j = 0; j < n; j++) {
+      //   for (int k = 0; k < n; k++) {
+      //     c[i * n + j] += a[i *n + k] * b[k * n + j];
+      //   }
+      // }
+    }
+  }
+}
diff --git a/src/main/java/edu/thi/phga/aparapi_test/RadixSort.java b/src/main/java/edu/thi/phga/aparapi_test/RadixSort.java
new file mode 100644
index 0000000..17d6975
--- /dev/null
+++ b/src/main/java/edu/thi/phga/aparapi_test/RadixSort.java
@@ -0,0 +1,86 @@
+package edu.thi.phga.aparapi_test;
+
+import java.util.Arrays;
+import java.util.Random;
+
+import com.aparapi.Kernel;
+import com.aparapi.Range;
+
+public class RadixSort {
+  private static final int N = 1 << App.multiParam;
+  // private static int[] input = new Random().ints(N, 0, Integer.MAX_VALUE).toArray();
+  private static int[] input = new Random().ints(N, 0, 30).toArray();
+  private static int[] output = new int[N];
+  private static int[] flags = new int[N];
+  private static int[] sums = new int[N];
+  static int x;
+
+  public static void start() {
+    Kerni k = new Kerni();
+    Range r = Range.create(N);
+    System.out.println("Range: " + r);
+
+
+    System.out.print("BEFORE: ");
+    print(Math.min(20, N));
+
+    for (x = 0; x < 31; x++) {
+      System.out.printf("%d: %d\n", x, (1 << x));
+      k.setParams(input, output, flags, sums, 1, 1 << x);
+      k.execute(r);
+      // Arrays.parallelSetAll(flags, (i) ->
+      //     1 - ((input[i] >> x) % 2)
+      // );
+      sums = flags.clone();
+      Arrays.parallelPrefix(sums, Integer::sum);
+      k.setParams(input, output, flags, sums, 0, 1 << x);
+      k.execute(r);
+      input = output.clone();
+    }
+
+    System.out.print("AFTER: ");
+    print(Math.min(20, N));
+
+  }
+
+  private static void print(int n) {
+    for (int x = 0; x < n; x++) {
+      System.out.printf("%d, ", input[x]);
+    }
+    System.out.println("");
+  }
+
+  private static class Kerni extends Kernel {
+    private int[] input, output, flags, sums;
+    private int job, mask;
+    public void setParams(int[] input, int[] output, int[] flags,
+      int[] sums, int job, int mask) {
+      this.input = input;
+      this.output = output;
+      this.flags = flags;
+      this.sums = sums;
+      this.job = job;
+      this.mask = mask;
+    }
+
+    @Override
+    public void run() {
+      if (job == 0)
+        sort();
+      else
+        flag();
+    }
+
+    private void flag() {
+      int i = getGlobalId(0);
+      flags[i] = (input[i] & mask) != 0 ? 0 : 1;
+    }
+
+    private void sort() {
+      int i = getGlobalId(0);
+      int N = getGlobalSize(0);
+      output[flags[i] == 1 ? sums[i] - 1 :
+        i - sums[i] + sums[N - 1]] = input[i];
+    }
+  }
+}