Logisim v1.0
subcircuit {
	name {2-input NAND gate}
	logisim.CirComponentSwitch{
		coord {40 40}
		text { x}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 80}
		text { y}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentAnd{
		coord {140 60}
	}
	logisim.CirComponentNot{
		coord {200 60}
	}
	logisim.CirComponentLED{
		coord {230 60}
		text { (xy)'}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentText{
		coord {140 125}
		text {2-input NAND gate}
		font {SansSerif 18 b}
		halign {center}
		valign {baseline}
	}
	logisim.WireTree{
		wire {coords {40 40 90 40}
		}
	}
	logisim.WireTree{
		wire {coords {40 80 90 80}
		}
	}
	logisim.WireTree{
		wire {coords {140 60 170 60}
		}
	}
	logisim.WireTree{
		wire {coords {200 60 230 60}
		}
	}
}
subcircuit {
	name {3-input NAND gate}
	logisim.CirComponentSwitch{
		coord {40 40}
		text { x}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 80}
		text { y}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 120}
		text { z}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentAnd{
		coord {150 80}
	}
	logisim.CirComponentNot{
		coord {210 80}
	}
	logisim.CirComponentLED{
		coord {240 80}
		text { (xyz)'}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentText{
		coord {140 165}
		text {3-input NAND gate}
		font {SansSerif 18 b}
		halign {center}
		valign {baseline}
	}
	logisim.WireTree{
		wire {coords {70 40 70 70}
		}
		wire {coords {40 40 70 40}
		}
		wire {coords {70 70 100 70}
		}
	}
	logisim.WireTree{
		wire {coords {70 90 70 120}
		}
		wire {coords {40 120 70 120}
		}
		wire {coords {70 90 100 90}
		}
	}
	logisim.WireTree{
		wire {coords {40 80 100 80}
		}
	}
	logisim.WireTree{
		wire {coords {150 80 180 80}
		}
	}
	logisim.WireTree{
		wire {coords {210 80 240 80}
		}
	}
}
subcircuit {
	name {4-input NAND gate}
	logisim.CirComponentSwitch{
		coord {40 40}
		text { w}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 80}
		text { x}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 120}
		text { y}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 160}
		text { z}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentAnd{
		coord {150 100}
	}
	logisim.CirComponentNot{
		coord {210 100}
	}
	logisim.CirComponentLED{
		coord {240 100}
		text { (wxyz)'}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentText{
		coord {140 205}
		text {4-input NAND gate}
		font {SansSerif 18 b}
		halign {center}
		valign {baseline}
	}
	logisim.WireTree{
		wire {coords {40 160 80 160}
		}
		wire {coords {80 120 80 160}
		}
		wire {coords {80 120 100 120}
		}
	}
	logisim.WireTree{
		wire {coords {40 120 60 120}
		}
		wire {coords {60 110 60 120}
		}
		wire {coords {60 110 100 110}
		}
	}
	logisim.WireTree{
		wire {coords {40 80 60 80}
		}
		wire {coords {60 80 60 90}
		}
		wire {coords {60 90 100 90}
		}
	}
	logisim.WireTree{
		wire {coords {40 40 80 40}
		}
		wire {coords {80 40 80 80}
		}
		wire {coords {80 80 100 80}
		}
	}
	logisim.WireTree{
		wire {coords {150 100 180 100}
		}
	}
	logisim.WireTree{
		wire {coords {210 100 240 100}
		}
	}
}
subcircuit {
	name {2-input NOR gate}
	logisim.CirComponentSwitch{
		coord {40 40}
		text { x}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 80}
		text { y}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentOr{
		coord {140 60}
	}
	logisim.CirComponentNot{
		coord {200 60}
	}
	logisim.CirComponentLED{
		coord {230 60}
		text { (x+y)'}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentText{
		coord {140 125}
		text {2-input NOR gate}
		font {SansSerif 18 b}
		halign {center}
		valign {baseline}
	}
	logisim.WireTree{
		wire {coords {40 40 90 40}
		}
	}
	logisim.WireTree{
		wire {coords {40 80 90 80}
		}
	}
	logisim.WireTree{
		wire {coords {140 60 170 60}
		}
	}
	logisim.WireTree{
		wire {coords {200 60 230 60}
		}
	}
}
subcircuit {
	name {3-input NOR gate}
	logisim.CirComponentSwitch{
		coord {40 40}
		text { x}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 80}
		text { y}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 120}
		text { z}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentOr{
		coord {150 80}
	}
	logisim.CirComponentNot{
		coord {210 80}
	}
	logisim.CirComponentLED{
		coord {240 80}
		text { (x+y+z)'}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentText{
		coord {140 165}
		text {3-input NOR gate}
		font {SansSerif 18 b}
		halign {center}
		valign {baseline}
	}
	logisim.WireTree{
		wire {coords {70 40 70 70}
		}
		wire {coords {40 40 70 40}
		}
		wire {coords {70 70 100 70}
		}
	}
	logisim.WireTree{
		wire {coords {70 90 70 120}
		}
		wire {coords {40 120 70 120}
		}
		wire {coords {70 90 100 90}
		}
	}
	logisim.WireTree{
		wire {coords {40 80 100 80}
		}
	}
	logisim.WireTree{
		wire {coords {150 80 180 80}
		}
	}
	logisim.WireTree{
		wire {coords {210 80 240 80}
		}
	}
}
subcircuit {
	name {4-input NOR gate}
	logisim.CirComponentSwitch{
		coord {40 40}
		text { w}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 80}
		text { x}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 120}
		text { y}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 160}
		text { z}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentOr{
		coord {150 100}
	}
	logisim.CirComponentNot{
		coord {210 100}
	}
	logisim.CirComponentLED{
		coord {240 100}
		text { (w+x+y+z)'}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentText{
		coord {140 205}
		text {4-input NOR gate}
		font {SansSerif 18 b}
		halign {center}
		valign {baseline}
	}
	logisim.WireTree{
		wire {coords {40 160 80 160}
		}
		wire {coords {80 120 80 160}
		}
		wire {coords {80 120 100 120}
		}
	}
	logisim.WireTree{
		wire {coords {40 120 60 120}
		}
		wire {coords {60 110 60 120}
		}
		wire {coords {60 110 100 110}
		}
	}
	logisim.WireTree{
		wire {coords {40 80 60 80}
		}
		wire {coords {60 80 60 90}
		}
		wire {coords {60 90 100 90}
		}
	}
	logisim.WireTree{
		wire {coords {40 40 80 40}
		}
		wire {coords {80 40 80 80}
		}
		wire {coords {80 80 100 80}
		}
	}
	logisim.WireTree{
		wire {coords {150 100 180 100}
		}
	}
	logisim.WireTree{
		wire {coords {210 100 240 100}
		}
	}
}
subcircuit {
	name {2-input XOR gate}
	logisim.CirComponentSwitch{
		coord {40 40}
		text { x}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 80}
		text { y}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentOr{
		coord {180 60}
	}
	logisim.Subcircuit{
		coord {170 140}
		subcircuit {2-input NAND gate}
	}
	logisim.CirComponentAnd{
		coord {290 100}
	}
	logisim.CirComponentLED{
		coord {320 100}
		text { x'y+xy'}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentText{
		coord {155 130}
		text {NAND}
		font {SansSerif 12 -}
		halign {center}
		valign {baseline}
	}
	logisim.CirComponentText{
		coord {195 55}
		text {x+y}
		font {SansSerif 12 -}
		halign {center}
		valign {baseline}
	}
	logisim.CirComponentText{
		coord {195 155}
		text {(xy)'}
		font {SansSerif 12 -}
		halign {center}
		valign {baseline}
	}
	logisim.CirComponentText{
		coord {190 195}
		text {2-input XOR gate}
		font {SansSerif 18 b}
		halign {center}
		valign {baseline}
	}
	logisim.WireTree{
		wire {coords {90 40 90 140}
		}
		wire {coords {90 40 130 40}
		}
		wire {coords {40 40 90 40}
		}
		wire {coords {90 140 140 140}
		}
	}
	logisim.WireTree{
		wire {coords {70 80 70 150}
		}
		wire {coords {70 80 130 80}
		}
		wire {coords {40 80 70 80}
		}
		wire {coords {70 150 140 150}
		}
	}
	logisim.WireTree{
		wire {coords {180 60 210 60}
		}
		wire {coords {210 60 210 90}
		}
		wire {coords {210 90 240 90}
		}
	}
	logisim.WireTree{
		wire {coords {170 140 210 140}
		}
		wire {coords {210 110 210 140}
		}
		wire {coords {210 110 240 110}
		}
	}
	logisim.WireTree{
		wire {coords {290 100 320 100}
		}
	}
}
subcircuit {
	name {1-bit half adder}
	logisim.CirComponentSwitch{
		coord {40 40}
		text { x}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 110}
		text { y}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.Subcircuit{
		coord {160 40}
		subcircuit {2-input XOR gate}
	}
	logisim.CirComponentAnd{
		coord {180 100}
	}
	logisim.CirComponentLED{
		coord {210 40}
		text { S}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentLED{
		coord {210 100}
		text { C}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentText{
		coord {145 30}
		text {XOR}
		font {SansSerif 12 -}
		halign {center}
		valign {baseline}
	}
	logisim.CirComponentText{
		coord {130 165}
		text {1-bit half adder}
		font {SansSerif 18 b}
		halign {center}
		valign {baseline}
	}
	logisim.WireTree{
		wire {coords {70 50 130 50}
		}
		wire {coords {40 110 70 110}
		}
		wire {coords {70 110 130 110}
		}
		wire {coords {70 50 70 110}
		}
	}
	logisim.WireTree{
		wire {coords {40 40 90 40}
		}
		wire {coords {90 40 130 40}
		}
		wire {coords {90 40 90 90}
		}
		wire {coords {90 90 130 90}
		}
	}
	logisim.WireTree{
		wire {coords {160 40 210 40}
		}
	}
	logisim.WireTree{
		wire {coords {180 100 210 100}
		}
	}
}
subcircuit {
	name {1-bit full adder}
	logisim.CirComponentSwitch{
		coord {40 40}
		text { x}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 90}
		text { y}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentSwitch{
		coord {40 140}
		text { z}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.Subcircuit{
		coord {130 60}
		subcircuit {1-bit half adder}
	}
	logisim.Subcircuit{
		coord {240 90}
		subcircuit {1-bit half adder}
	}
	logisim.CirComponentOr{
		coord {360 110}
	}
	logisim.CirComponentLED{
		coord {390 60}
		text { S}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentLED{
		coord {390 110}
		text { C}
		font {SansSerif 12 -}
		labelpos {east}
	}
	logisim.CirComponentText{
		coord {115 50}
		text {H.A.}
		font {SansSerif 12 -}
		halign {center}
		valign {baseline}
	}
	logisim.CirComponentText{
		coord {170 55}
		text {S1}
		font {SansSerif 12 -}
		halign {center}
		valign {baseline}
	}
	logisim.CirComponentText{
		coord {170 135}
		text {C1}
		font {SansSerif 12 -}
		halign {center}
		valign {baseline}
	}
	logisim.CirComponentText{
		coord {225 80}
		text {H.A.}
		font {SansSerif 12 -}
		halign {center}
		valign {baseline}
	}
	logisim.CirComponentText{
		coord {290 55}
		text {S2}
		font {SansSerif 12 -}
		halign {center}
		valign {baseline}
	}
	logisim.CirComponentText{
		coord {290 95}
		text {C2}
		font {SansSerif 12 -}
		halign {center}
		valign {baseline}
	}
	logisim.CirComponentText{
		coord {210 185}
		text {1-bit full adder}
		font {SansSerif 18 b}
		halign {center}
		valign {baseline}
	}
	logisim.WireTree{
		wire {coords {40 40 70 40}
		}
		wire {coords {70 40 70 60}
		}
		wire {coords {70 60 100 60}
		}
	}
	logisim.WireTree{
		wire {coords {40 90 70 90}
		}
		wire {coords {70 70 70 90}
		}
		wire {coords {70 70 100 70}
		}
	}
	logisim.WireTree{
		wire {coords {130 60 180 60}
		}
		wire {coords {180 60 180 90}
		}
		wire {coords {180 90 210 90}
		}
	}
	logisim.WireTree{
		wire {coords {130 70 160 70}
		}
		wire {coords {160 70 160 120}
		}
		wire {coords {160 120 310 120}
		}
	}
	logisim.WireTree{
		wire {coords {240 100 310 100}
		}
	}
	logisim.WireTree{
		wire {coords {240 90 270 90}
		}
		wire {coords {270 60 270 90}
		}
		wire {coords {270 60 390 60}
		}
	}
	logisim.WireTree{
		wire {coords {360 110 390 110}
		}
	}
	logisim.WireTree{
		wire {coords {130 100 210 100}
		}
		wire {coords {40 140 130 140}
		}
		wire {coords {130 100 130 140}
		}
	}
}
subcircuit {
	name {Laboratory}
}
main {Laboratory}