Systems Engineering
Focuses on the overall development process of a system that is based on established processes, documented needs and traceable communications or interaction among the customers, users, engineers, and other stakeholders
Systems Integration
Focuses on complex information systems that may include designing or building a customized architecture or application, integrating it with new or existing hardware, packaged and custom software, and communications. Most enterprises rely on an external contractor for program management of most or all phases of system development.
Systems Life Cycle Management
Focuses on addressing all phases of its existence to include system conception, design, development, production, construction, distribution, operation, maintenance, support, retirement, phase-out and disposal.
Systems Administration
Focuses on the person or team who is responsible for the upkeep, configuration, and reliable operation of computer systems; especially multi-user computers, such as servers. The system administrator seeks to ensure that the uptime, performance, resources, and security of the computers they manage meet the needs of the users, without exceeding a set budget when doing so.