Stair & Reynolds (2011) defines an information system as a set of components that collect, manipulate, store, and disseminate data and information with the purpose of meeting an objective. Information systems are used in almost every profession and organizations rely on them to interact with their customers and perform their operations effectively.
This short video presents a brief overview on the concept of information systems: https://www.youtube.com/watch?v=Qujsd4vkqFI
References:
Stair, R., & Reynolds, G. (2020). Principles of Information Systems. Cengage Learning. http://site.iugaza.edu.ps/kdahleez/files/2014/09/stair78292_0538478292_02.01_chapter01.pdf