diff --git a/projects/01/abgabe/And.hdl b/projects/01/abgabe/And.hdl
new file mode 100644
index 0000000..036d085
--- /dev/null
+++ b/projects/01/abgabe/And.hdl
@@ -0,0 +1,19 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/01/And.hdl
+
+/**
+ * And gate: 
+ * out = 1 if (a == 1 and b == 1)
+ *       0 otherwise
+ */
+
+CHIP And {
+    IN a, b;
+    OUT out;
+
+    PARTS:
+        Nand(a=a ,b=b ,out=nandout);
+        Not(in=nandout ,out=out);
+}
diff --git a/projects/01/abgabe/And16.hdl b/projects/01/abgabe/And16.hdl
new file mode 100644
index 0000000..8e1d9cc
--- /dev/null
+++ b/projects/01/abgabe/And16.hdl
@@ -0,0 +1,18 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/01/And16.hdl
+
+/**
+ * 16-bit bitwise And:
+ * for i = 0..15: out[i] = (a[i] and b[i])
+ */
+
+CHIP And16 {
+    IN a[16], b[16];
+    OUT out[16];
+
+    PARTS:
+        Nand16(a=a,b=b,out=outnand);
+        Not16(in=outnand,out=out);    
+}
\ No newline at end of file
diff --git a/projects/01/abgabe/DMux.hdl b/projects/01/abgabe/DMux.hdl
new file mode 100644
index 0000000..9425b89
--- /dev/null
+++ b/projects/01/abgabe/DMux.hdl
@@ -0,0 +1,20 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/01/DMux.hdl
+
+/**
+ * Demultiplexor:
+ * {a, b} = {in, 0} if sel == 0
+ *          {0, in} if sel == 1
+ */
+
+CHIP DMux {
+    IN in, sel;
+    OUT a, b;
+
+    PARTS:
+        Not(in=sel, out=notsel);
+        And(a=in,b=notsel,out=a);
+        And(a=sel,b=in,out=b);
+}
diff --git a/projects/01/abgabe/DMux4Way.hdl b/projects/01/abgabe/DMux4Way.hdl
new file mode 100644
index 0000000..ca3ca4f
--- /dev/null
+++ b/projects/01/abgabe/DMux4Way.hdl
@@ -0,0 +1,22 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/01/DMux4Way.hdl
+
+/**
+ * 4-way demultiplexor:
+ * {a, b, c, d} = {in, 0, 0, 0} if sel == 00
+ *                {0, in, 0, 0} if sel == 01
+ *                {0, 0, in, 0} if sel == 10
+ *                {0, 0, 0, in} if sel == 11
+ */
+
+CHIP DMux4Way {
+    IN in, sel[2];
+    OUT a, b, c, d;
+
+    PARTS:
+    DMux(in=in, sel=sel[1], a=dmuxouta, b=dmuxoutb);
+    DMux(in=dmuxouta, sel=sel[0], a=a, b=b);
+    DMux(in=dmuxoutb, sel=sel[0], a=c, b=d);
+}
\ No newline at end of file
diff --git a/projects/01/abgabe/DMux8Way.hdl b/projects/01/abgabe/DMux8Way.hdl
new file mode 100644
index 0000000..fdf4ce5
--- /dev/null
+++ b/projects/01/abgabe/DMux8Way.hdl
@@ -0,0 +1,23 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/01/DMux8Way.hdl
+
+/**
+ * 8-way demultiplexor:
+ * {a, b, c, d, e, f, g, h} = {in, 0, 0, 0, 0, 0, 0, 0} if sel == 000
+ *                            {0, in, 0, 0, 0, 0, 0, 0} if sel == 001
+ *                            etc.
+ *                            {0, 0, 0, 0, 0, 0, 0, in} if sel == 111
+ */
+
+CHIP DMux8Way {
+    IN in, sel[3];
+    OUT a, b, c, d, e, f, g, h;
+
+    PARTS:
+    DMux(in=in, sel=sel[2], a=dmuxouta, b=dmuxoutb);
+    DMux4Way(in=dmuxouta, sel=sel[0..1], a=a, b=b, c=c, d=d);
+    DMux4Way(in=dmuxoutb, sel=sel[0..1], a=e, b=f, c=g, d=h);
+    // Put your code here:
+}
\ No newline at end of file
diff --git a/projects/01/abgabe/Mux.hdl b/projects/01/abgabe/Mux.hdl
new file mode 100644
index 0000000..0464e7b
--- /dev/null
+++ b/projects/01/abgabe/Mux.hdl
@@ -0,0 +1,21 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/01/Mux.hdl
+
+/** 
+ * Multiplexor:
+ * out = a if sel == 0
+ *       b otherwise
+ */
+
+CHIP Mux {
+    IN a, b, sel;
+    OUT out;
+
+    PARTS:
+    Not(in=sel,out=notsel);
+    And(a=a,b=notsel,out=outand1);
+    And(a=sel,b=b,out=outand2);
+    Or(a=outand1,b=outand2,out=out);
+}
diff --git a/projects/01/abgabe/Mux16.hdl b/projects/01/abgabe/Mux16.hdl
new file mode 100644
index 0000000..e507ce4
--- /dev/null
+++ b/projects/01/abgabe/Mux16.hdl
@@ -0,0 +1,21 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/01/Mux16.hdl
+
+/**
+ * 16-bit multiplexor: 
+ * for i = 0..15 out[i] = a[i] if sel == 0 
+ *                        b[i] if sel == 1
+ */
+
+CHIP Mux16 {
+    IN a[16], b[16], sel;
+    OUT out[16];
+
+    PARTS:
+        Not(in=sel,out=notsel);
+        And16(a=a,b[0]=notsel,b[1]=notsel,b[2]=notsel,b[3]=notsel,b[4]=notsel,b[5]=notsel,b[6]=notsel,b[7]=notsel,b[8]=notsel,b[9]=notsel,b[10]=notsel,b[11]=notsel,b[12]=notsel,b[13]=notsel,b[14]=notsel,b[15]=notsel,out=outand1);
+        And16(a[0]=sel,a[1]=sel,a[2]=sel,a[3]=sel,a[4]=sel,a[5]=sel,a[6]=sel,a[7]=sel,a[8]=sel,a[9]=sel,a[10]=sel,a[11]=sel,a[12]=sel,a[13]=sel,a[14]=sel,a[15]=sel,b=b,out=outand2);
+        Or16(a=outand1,b=outand2,out=out);
+}
diff --git a/projects/01/abgabe/Mux4Way16.hdl b/projects/01/abgabe/Mux4Way16.hdl
new file mode 100644
index 0000000..038b7c0
--- /dev/null
+++ b/projects/01/abgabe/Mux4Way16.hdl
@@ -0,0 +1,22 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/01/Mux4Way16.hdl
+
+/**
+ * 4-way 16-bit multiplexor:
+ * out = a if sel == 00
+ *       b if sel == 01
+ *       c if sel == 10
+ *       d if sel == 11
+ */
+
+CHIP Mux4Way16 {
+    IN a[16], b[16], c[16], d[16], sel[2];
+    OUT out[16];
+
+    PARTS:
+    Mux16(a=a,b=b,sel=sel[0],out=mux16out1);
+    Mux16(a=c,b=d,sel=sel[0],out=mux16out2);
+    Mux16(a=mux16out1,b=mux16out2,sel=sel[1],out=out);
+}
\ No newline at end of file
diff --git a/projects/01/abgabe/Mux8Way16.hdl b/projects/01/abgabe/Mux8Way16.hdl
new file mode 100644
index 0000000..6ffe518
--- /dev/null
+++ b/projects/01/abgabe/Mux8Way16.hdl
@@ -0,0 +1,24 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/01/Mux8Way16.hdl
+
+/**
+ * 8-way 16-bit multiplexor:
+ * out = a if sel == 000
+ *       b if sel == 001
+ *       etc.
+ *       h if sel == 111
+ */
+
+CHIP Mux8Way16 {
+    IN a[16], b[16], c[16], d[16],
+       e[16], f[16], g[16], h[16],
+       sel[3];
+    OUT out[16];
+
+    PARTS:
+    Mux4Way16(a=a,b=b,c=c,d=d,sel=sel[0..1],out=mux4way1);
+    Mux4Way16(a=e,b=f,c=g,d=h,sel=sel[0..1],out=mux4way2);
+    Mux16(a=mux4way1,b=mux4way2,sel=sel[2],out=out);
+}
\ No newline at end of file
diff --git a/projects/01/abgabe/Nand16.hdl b/projects/01/abgabe/Nand16.hdl
new file mode 100644
index 0000000..f9bb580
--- /dev/null
+++ b/projects/01/abgabe/Nand16.hdl
@@ -0,0 +1,28 @@
+
+/**
+ * 16-bit bitwise And:
+ * for i = 0..15: out[i] = (a[i] and b[i])
+ */
+
+CHIP Nand16 {
+    IN a[16], b[16];
+    OUT out[16];
+
+    PARTS:
+        Nand(a=a[0],b=b[0],out=out[0]);
+        Nand(a=a[1],b=b[1],out=out[1]);
+        Nand(a=a[2],b=b[2],out=out[2]);
+        Nand(a=a[3],b=b[3],out=out[3]);
+        Nand(a=a[4],b=b[4],out=out[4]);
+        Nand(a=a[5],b=b[5],out=out[5]);
+        Nand(a=a[6],b=b[6],out=out[6]);
+        Nand(a=a[7],b=b[7],out=out[7]);
+        Nand(a=a[8],b=b[8],out=out[8]);
+        Nand(a=a[9],b=b[9],out=out[9]);
+        Nand(a=a[10],b=b[10],out=out[10]);
+        Nand(a=a[11],b=b[11],out=out[11]);
+        Nand(a=a[12],b=b[12],out=out[12]);
+        Nand(a=a[13],b=b[13],out=out[13]);
+        Nand(a=a[14],b=b[14],out=out[14]);    
+        Nand(a=a[15],b=b[15],out=out[15]);
+}
\ No newline at end of file
diff --git a/projects/01/abgabe/Not.hdl b/projects/01/abgabe/Not.hdl
index 14fb886..788f638 100644
--- a/projects/01/abgabe/Not.hdl
+++ b/projects/01/abgabe/Not.hdl
@@ -14,5 +14,4 @@ CHIP Not {
 
     PARTS:
     Nand(a=in,b=in,out=out);
-    // Put your code here:
 }
diff --git a/projects/01/abgabe/Not16.hdl b/projects/01/abgabe/Not16.hdl
new file mode 100644
index 0000000..e13c0a0
--- /dev/null
+++ b/projects/01/abgabe/Not16.hdl
@@ -0,0 +1,32 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/01/Not16.hdl
+
+/**
+ * 16-bit Not:
+ * for i=0..15: out[i] = not in[i]
+ */
+
+CHIP Not16 {
+    IN in[16];
+    OUT out[16];
+
+    PARTS:
+        Not(in=in[0],out=out[0]);
+        Not(in=in[1],out=out[1]);
+        Not(in=in[2],out=out[2]);
+        Not(in=in[3],out=out[3]);
+        Not(in=in[4],out=out[4]);
+        Not(in=in[5],out=out[5]);
+        Not(in=in[6],out=out[6]);
+        Not(in=in[7],out=out[7]);
+        Not(in=in[8],out=out[8]);
+        Not(in=in[9],out=out[9]);
+        Not(in=in[10],out=out[10]);
+        Not(in=in[11],out=out[11]);
+        Not(in=in[12],out=out[12]);
+        Not(in=in[13],out=out[13]);
+        Not(in=in[14],out=out[14]);
+        Not(in=in[15],out=out[15]);
+}
diff --git a/projects/01/abgabe/Or.hdl b/projects/01/abgabe/Or.hdl
new file mode 100644
index 0000000..70bb660
--- /dev/null
+++ b/projects/01/abgabe/Or.hdl
@@ -0,0 +1,20 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/01/Or.hdl
+
+ /**
+ * Or gate:
+ * out = 1 if (a == 1 or b == 1)
+ *       0 otherwise
+ */
+
+CHIP Or {
+    IN a, b;
+    OUT out;
+
+    PARTS:
+    Not(in=a,out=nota);
+    Not(in=b,out=notb);
+    Nand(a=nota,b=notb,out=out);
+}
diff --git a/projects/01/abgabe/Or16.hdl b/projects/01/abgabe/Or16.hdl
new file mode 100644
index 0000000..ce585c2
--- /dev/null
+++ b/projects/01/abgabe/Or16.hdl
@@ -0,0 +1,19 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/01/Or16.hdl
+
+/**
+ * 16-bit bitwise Or:
+ * for i = 0..15 out[i] = (a[i] or b[i])
+ */
+
+CHIP Or16 {
+    IN a[16], b[16];
+    OUT out[16];
+
+    PARTS:
+        Not16(in=a,out=nota);
+        Not16(in=b,out=notb);
+        Nand16(a=nota,b=notb,out=out);
+}
\ No newline at end of file
diff --git a/projects/01/abgabe/Or8Way.hdl b/projects/01/abgabe/Or8Way.hdl
new file mode 100644
index 0000000..1597f24
--- /dev/null
+++ b/projects/01/abgabe/Or8Way.hdl
@@ -0,0 +1,23 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/01/Or8Way.hdl
+
+/**
+ * 8-way Or: 
+ * out = (in[0] or in[1] or ... or in[7])
+ */
+
+CHIP Or8Way {
+    IN in[8];
+    OUT out;
+
+    PARTS:
+    Or(a=in[0],b=in[1],out=or1);
+    Or(a=or1,b=in[2],out=or2);
+    Or(a=or2,b=in[3],out=or3);
+    Or(a=or3,b=in[4],out=or4);
+    Or(a=or4,b=in[5],out=or5);
+    Or(a=or5,b=in[6],out=or6);
+    Or(a=or6,b=in[7],out=out);
+}
\ No newline at end of file
diff --git a/projects/01/abgabe/Xor.hdl b/projects/01/abgabe/Xor.hdl
new file mode 100644
index 0000000..a9e9d7c
--- /dev/null
+++ b/projects/01/abgabe/Xor.hdl
@@ -0,0 +1,21 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/01/Xor.hdl
+
+/**
+ * Exclusive-or gate:
+ * out = not (a == b)
+ */
+
+CHIP Xor {
+    IN a, b;
+    OUT out;
+
+    PARTS:
+    Not(in=a, out=nota);
+    Not(in=b, out=notb);    
+    Nand(a=nota, b=b, out=nandout1);
+    Nand(a=a, b=notb, out=nandout2);
+    Nand(a=nandout1, b=nandout2, out=out);
+}
diff --git a/projects/01/abgabe/Xor2.hdl b/projects/01/abgabe/Xor2.hdl
new file mode 100644
index 0000000..360621c
--- /dev/null
+++ b/projects/01/abgabe/Xor2.hdl
@@ -0,0 +1,20 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/01/Xor.hdl
+
+/**
+ * Exclusive-or gate:
+ * out = not (a == b)
+ */
+
+CHIP Xor {
+    IN a, b;
+    OUT out;
+
+    PARTS:
+    Nand(a=a, b=b,out=nand1); 
+    Nand(a=a, b=nand1, out=nandout1);
+    Nand(a=a, b=nand1, out=nandout2);
+    Nand(a=nandout1, b=nandout2, out=out);
+}
diff --git a/projects/01/abgabe/project1.zip b/projects/01/abgabe/project1.zip
new file mode 100644
index 0000000..0a1d9d0
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