Second, RD: R&D engineer, R&D engineer, professional worker who has some experience in systematically researching and developing things that don't exist, or professional worker who improves existing things to achieve the purpose of optimization.
Third, QA: quality assurance, quality assurance. The main responsibility of QA is quality assurance.
Four. OP: operator, operator and administrator.
Extended data:
The product manager is the position responsible for product management in the enterprise. The product manager is responsible for market research and decides what products to develop and what technologies and business models to choose according to the needs of users. And promote the development organization of corresponding products. He should also coordinate R&D, marketing and operation according to the product life cycle, determine and organize the implementation of the corresponding product strategy and a series of other related product management activities.
R&D engineer refers to a professional worker who is engaged in a certain industry, systematically researching and developing something that does not exist and has certain experience, or improving something that already exists to achieve the purpose of optimization.
Quality assurance is also a part of quality management, which is committed to providing trust to meet quality requirements. Quality assurance refers to all planned and systematic activities implemented in the quality management system, so as to make people believe that products or services can meet the quality requirements and verify them as needed. Quality assurance is generally applicable to occasions with contracts, and its main purpose is to make users believe that products or services can meet the specified quality requirements.
The operator is the person responsible for maintaining the SQL SERVER system. The operator can be operated by one person. In those large enterprises with many servers, operators can also be served by many people.
References:
Baidu encyclopedia: product manager Baidu encyclopedia: R&D engineer Baidu encyclopedia: quality assurance Baidu encyclopedia: operator