@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (!(obj instanceof Computer))
			return false;
		Computer comp = (Computer) obj;
		if (producer != null)
			if (producer.equals(getProducer()) && comp.getModel() == this.model)
				return true;
		return false;
	}