> Humans are visual animals, GUI's are a result of our evolutionary history. Your example isn't really why GUIs are good. Yes, humans are great at navigating

> Humans are visual animals, GUI's are a result of our evolutionary history. Your example isn't really why GUIs are good. Yes, humans are great at navigating a GUI, however all four of those problems are introduced by the GUI to begin with. On a command line, you don't have to scan 1.3 million pixels. You learned where to look the first time you ever used it. You don't have to ignore anything, except maybe your scrollback buffer. You don't have to find any buttons. You don't have to identify a symbolic representation of the task at hand. You do have to know what you're doing, which I'll address later. And those tasks are NOT done effortlessly. We may pretend it is, but frankly I have a huge problem with the clutter of my GUI. My brain gets tired, often without my realizing it, filtering out all the extraneous crap on my screen. I'm so much more productive with all that out of the way. I've taken to using compiz zoom to clear out all my tabs and taskbars and menus and of course ads and stuff so I can actually focus on the articles I'm reading. But yes, you do have to know ahead of time how to do what you want to do. There is no representation to guide you, symbolic or otherwise, unless you know how to look for it. What the GUI actually does is the last sentence of your post: GUIs convey information. GUIs let people learn to use something as they go. Without a GUI, there is usually more of an up-front investment into learning how to use a tool. That people are good at navigating GUIs is incidental. People are good at using mechanical devices and language, too. And as someone who has spent a significant amount of time helping people use windows applications, often the GUI doesn't even matter. They still have to get help to accomplish simple things, and often wind up completely misunderstanding what the GUI is trying to tell them. > However, teaching the average person to use a new piece of software is near impossible without utilizing their incredible brain power for visual recognition. It's not impossible. 20 years ago, before "UX designer" was even a word, plenty of average, non-technical employees used text-based and command-line systems to get work done. Students at my university had no problem using PINE on OpenVMS to read their email. People have the ability to learn command language and program motor memory. It's not even close to impossible. But learning a formal language rather than a graphical interface is just sufficiently harder that having an easier-to-use GUI gives software vendors a competitive advantage. So in the last 20 years have GUIs have evolved a great deal, and are used even when they don't fully expose the power of the software they're providing, or fail to provide the user all the knowledge necessary to use the software effectively.