Information technology systems refer to the combination of hardware, software, and networks that organizations use to collect, store, manage, and communicate data. These systems enable businesses to operate efficiently by automating processes, facilitating communication, and providing tools for data analysis. Common components of information technology systems include computers, servers, databases, and network infrastructure. They support various applications, such as email, cloud computing, and enterprise resource planning (ERP) systems, which help organizations streamline operations and improve decision-making.