We just learned about the
Microsoft Windows.
Another type of operating system is called
Mac OS, which stands for Macintosh Operating System.
This is a program made by a company called Apple, that has their headquarters in Cupertino, California.
If you have an Apple computer like a Macbook, when you turn it on it will start up Mac OS, and let you do things like go to the internet on your web browser, watch videos, work with pictures or listen to music.
Mac OS and Microsoft Windows are very similar, and both let you do a bunch of different things at the same time, with different spaces for each program that you can open, close, move or resize.
Apple first came out with Mac OS in 1984, called "Macintosh System Software" or just "System 1".
Years later they would come out with a newer Mac OS and give it a higher number like System 2 or System 3.
Later on they just started calling it Mac OS 7, 8 or 9.
When they were making Mac OS 10, they used "X" for the Roman numeral 10, and then had a bunch of different names for Mac OS X named after wild cats, like Mac OS Tiger or Mac OS Lion.
Now they have changed to using the name of a place, like macOS Yosemite, or macOS Monterey.
Every time they come up with a new name or number for MacOS they add new things the operating system can do.
(from: wikipedia -
macintosh operating systems)
Kid Facts - Blast from the past: Tappet