software that is used simultaneously by multiple users in an organization is called
Multi-user software Multi-user software is software that allows access by multiple users of a computer. Time-sharing systems are multi-user systems. Most batch processing systems for mainframe computers may also be considered "multi-user", to avoid leaving the CPU idle while it waits for I/O operations to complete. However, the term "multitasking" is more common in this context.
Information system An information system (IS) is an organized system for the collection, organization, storage and communication of information. More specifically, it is the study of complementary networks that people and organizations use to collect, filter, process, create and distribute data. Further, "[a]n information system (IS) is a group of components that interact to produce information. It focuses on the internal rather than the external." Information system can also be described as a combination of hardware, software, data, business process and functions which can be used to increase efficiency and management of an organization. Information Systems is the expression used to describe an Automated System (which may be referred to as a Computerized Information System), be it manual, which covers people, machines or organized methods to collect, process, transmit and disseminate data representing information for the user or client.[1]