No. It’s almost all the time that your computer has more than one thing to do; - your browser uses a process per tab - your web server responds to multiple req

No. It’s almost all the time that your computer has more than one thing to do; - your browser uses a process per tab - your web server responds to multiple requests in parallel - your web app is going to launch other programs - your desktop ui is going to have a compositing server separate from each application - your compiler is going to work on multiple source files