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Computer services, namely, providing on-line [ books, ] manuals, [ magazines, ] guides, [ forms, ] illustrations [ and technical data packages ] in the field of aircraft, aircraft parts, avionics, and maintenance [ , operation, repair, and training ] associated with aircraft and aerospace products, parts and support equipment [ ; technical consultation and assistance related to the ] [ design, manufacture, certification, ] [ operation, maintenance, repair, overhaul, or modification of aircraft and aircraft parts ]