Computer systems are intricate combinations of hardware and software that work together to execute tasks and solve problems. At their core, they consist of processors, memory, storage, input/output devices, and an operating system. The processor, or CPU, executes instructions stored in memory, while storage devices hold data and programs. Input/output devices facilitate interaction with the system, and the operating system manages resources and provides an interface for users and applications. Together, these components form the foundation of modern computing.