42 Testing and designing of electrical control panels; engineering; engineering design services; electrical engineering; mechanical engineering; automation engineering; reverse engineering; professional computer services, namely, LAN/WAN design, wireless engineering, and virtualization; design for others in the field of computer networks, software, and engineering for the food processing industry; design for others in the field of computer networks, software, and engineering for the nuclear industry; engineering services in the field of nuclear waste retrieval; engineering services in the field of bio-gas processing; engineering services in the field of food processing; custom design and engineering of nuclear waste retrieval systems, namely, pumps, and custom below-the-hook lifting devices; drafting of plans and engineering drawing for others; computer-aided engineering services for others; engineering services in the field of environmental clean-up, namely, engineering for nuclear clean-up, and chemical clean-up; engineering services in the field of food processing, namely, engineering food processing equipment, and food processing factories; engineering services in the field of bio-gas production, namely, engineering bio-gas production equipment, and bio-gas production factories; plant engineering