Stationery equipment rental; Sales of lighting fixtures; Maintenance of electronic and mechanical equipment (excluding special equipment); Computer and office equipment maintenance; Professional repair of radar and radio navigation equipment; Sales of soil and site remediation equipment; Instrumentation repair; Lighting appliance manufacturing; General equipment repair; Sales of metal products; Repair of metal products; Engineering and technology research and experimental development; Thrift sales; Instrumentation sales; Retail of computer hardware and software and auxiliary equipment; Sales of industrial control computers and systems; Repair of electrical equipment; Wholesale of computer hardware and software and auxiliary equipment; Internet equipment sales; Display device manufacturing; Internet sales (except for the sale of goods that require a license); Sales of semiconductor lighting devices; Display device sales; Sales of household appliances; Sales of home audio-visual equipment; Sales of audio equipment; Sales of electrical equipment; Repair of special equipment