At any time, our screen cannot contain all the elements, such as a large number of files in a folder, or various media in a web page. This fun site contains the important elements of the current interaction design: scroll bars, the way the scroll bars are presented and interacted in different systems. There are both operating systems we are familiar with and operating systems that most people have never heard of. I do n’t know which operating system style you like, but I prefer the crystal clear feeling of Mac OS X 10.0 2001.
Tips: Swipe to the right in the webpage, you can see all the scroll bars.