DD & B Systems began operating as SOS Systems in 1996. In 2003 the name was changed. Now DD & B Systems has been in business since 1996 with the owners being avid model railroaders wanting our trains to operate as the prototypical railroads do. Since the inception of DCC (Digitrax) we have been selling, installing and repairing the parts to make engines DCC for our customers. We at DD & B SYSTEMS pride ourselves in the service after the sale which is how we are growing and continue to gain recognition with our customers.