What is the difference between R&D and technical services and information technology services?

Hello, information technology invoicing includes information system integration, network management, website content maintenance, desktop management maintenance, information system application, basic information technology management platform integration, information technology infrastructure management, data center, hosting center, information security service, online antivirus, virtual host and other business activities. R&D technical service refers to the business activities of your enterprise in the research and experimental development of new technologies, new products, new processes or new materials and their systems.