machine parts, namely, bearings

Installation, maintenance and repair of cell phone related hardware

Recreational services in the nature of quizzes and puzzles; educational services, namely, conducting classes, seminars, demonstrations and instruction in the field of engineering; arranging and conducting educational conferences and seminars, all relating to engineering

Printed publications, namely, books, magazines, leaflets, and postcards, all in the field of engineering; photographs; stationery; paperweights; and printed instructional and teaching materials in the field of engineering