42 short term computer software maintenance, technical consulting and technical support services, namely, troubleshooting of computer hardware and software problems in the fields of data processing, software engineering, software design, hardware engineering, hardware design and computer programming, computer software design for others, computer aided design (CAD), namely, providing design, drafting, and legacy conversion services, engineering, drafting and design service for others in the fields of electronics, chemicals, automobiles, petroleum, pharmaceuticals, aircraft, naval engineering and design, and power plants