Concrete building materials namely, [specific items include protective linings for live fire training structures]

computer programs and instructional manuals sold as a unit for use in training firefighters; namely, programs which simulate residential, commercial, or industrial fires in burn buildings, pits and mock-ups by operating gas-fueled burners, non-toxic smoke generators, and ventilator fans and vents, and by monitoring room temperatures, ventilation, fire intensity, and extinguishing effectiveness