A computer terminal can be thought of as the portal to all the inner workings of the computer. It’s a different way to see the information in your computer. Rater than image based, it’s text based. You can use it to maneuver through the computer’s folders and files via typed commands, rather than a cursor.
As a computational chemist, I spend a lot of time working within the terminal. A lot of my maneuvering through the terminal depends on my memory of the organization scheme of each folder and file. Currently, I have a reader with a background in coding who works alongside me. We work through problems together, with him to describe that which I cannot read. He also takes commands from me, because in same cases his sight allows him to enact them more quickly.