A) Undo
In most Windows applications, the Undo command is activated by pressing the Ctrl+Z or Alt+Backspace keybindings.
Answer:
Usually based on IOS or Android operating systems. (Like what phones use. It's usually a simplified broken-down version of this though.)
Explanation:
Most small electronic devices such as the one listed runs on IOS or Android operating systems. Typically it's used for a basic use but it's a small, fast, and easy to use kind of OP.
Access to a huge informational background, High degree of visibility, and Distance Education