services in the encouragement and promotion of cooperative spirit among association members in solving mutual technical problems;services in promoting arts and sciences pertaining to the natural gas industry; services in providing a channel for exchange of information and ideas among association members;services in informing and educating association members, the natural gas industry and the public at large regarding advancements and improvements in technical facets of the natural gas industry;services to association members in conducting technology and development programs directed toward improving reliability and cost effectiveness of design, construction, and operation of mechanical and fluid systems for the natural gas industry; and book, pamphlets, and printed materials and computer software for use in conducting educational, research and development programs directed to employees of association members and printed promotional and instructional materials for distribution by association members