Masking compounds for use in the manufacture of printed circuit boards; etchants for use in the manufacture of printed circuit boards; chemical coatings used in the manufacture of printed circuit boards; galvanizing preparations; filtering materials of chemical substances, namely, chemical preparations in the nature of filtering materials in air purification and water purification; gum solvents for industrial use; antioxidants for use in manufacture; biochemical catalysts

computer software program and manuals sold together as a unit for use in the automated production of work orders and instructions to maintenance crews, namely for providing instructions and schedules for maintenance work, for inventory control and for preventive servicing for large buildings and institutions