42 Computer technical support services, namely, 24/7 service desk/help desk services for IT infrastructure, operating systems, database systems, and web applications.; Computer technology support services, namely, help desk services; Technical support services, namely, troubleshooting in the nature of diagnosing computer hardware and software problems; Technical support services, namely, troubleshooting of industrial process control computer software problems; Technical support, namely, providing back-up computer programs and facilities