Nigeria Custom Services department is a government owned organization under the supervision of the federal Ministry of transport with responsibility of providing specific ports and labor services for the country’s meantime industry. One of their numerous duties and major functions is the provision of Cargo Handling Quays facilities. Right from the inception of this company, the billing system has been manually processed. The port complex is in the early stage of computerization and the manual method of preparing customers’ bills are delayed The impact of engineering age is tremendous and its arrears of application are increasing geometrically. It is believed that the information revolution will radically change the nature and quality of engineering work in the near future.