Leadership of a group of people with different functional expertise working toward a common goal.

Team building is a collective term for various types of activities used to enhance social relations and define roles within teams, often involving collaborative tasks. It is distinct from team training, which is designed to improve the efficiency, rather than interpersonal relations. wikipedia.org

System development methodology in software engineering is a framework that is used to structure, plan, and control the process of developing an information system. wikipedia.org

Human resource management is the management of an organization's workforce. It is responsible for the attraction, selection, training, assessment, and rewarding of employees, while also overseeing organizational leadership and culture, and ensuring compliance with employment and labor laws. wikipedia.org

A transactional account is a deposit account held at a bank or other financial institution, for the purpose of securely and quickly providing frequent access to funds on demand, through a variety of different channels. wikipedia.org

Customer service is the provision of service to customers before, during and after a purchase. wikipedia.org