In essence, this is a complex way of designing, monitoring and evaluating the information architecture of organisations. The first company to introduce a business system was IBM back in 1981. Things have changed massively since.
A business systems analyst reviews business systems, assessing and documenting the business model or its integration with technology.
A data scientist uses processes and systems to extract knowledge or insights from large volumes of data in various forms. These insights are used to advise executives and product managers on the implications of the data for products, processes, and decisions.
An operational researcher looks at ways in which a business or organisation can achieve their goals by working out how systems and process can be improved through mathematical, statistical and business theories.
A systems developer maintains organisational support systems, often working with a systems analyst or architect to implement updates based on insight.
A technical author uses their specialist knowledge to make guides, such as instruction manuals, business guidelines or even online help pages, for users of products and systems.