Yeah. That's um
Yeah.
Um , I'm just gonna go through the interface concept with yous now. Uh , first of all I'll explain what a user interface is. It's the aspects of a computer system which can be seen or otherwise perceived , for example , heard or felt maybe , or  by the human user. And it's also the commands that the user uses to control its operation and to input data. Um , there are two types of user interfaces. There's the graphical user interface , which emphasises the use of pictures for output and a pointing device , for example a mouse for input control. So that's sort of like the scroll thing we were talking about.
Oh. Okay. Yeah.