The operating system, or OS, is the software, headed by its Kernel, that controls the execution of programs, and generally includes services and programs such as resource allocation, scheduling, input-output control, and data management.IEC) Like a complete package of software that includes the kernel.

What’s the difference between OS and Kernel?

The best way to put it is with an example:
Notepad is a program that is part of the Windows operating system, not its kernel.