It’s a piece of hardware (you can touch it) that changes something on the screen. Examples are a keyboard putting letters on the screen or a mouse moving the cursor
You can make a hierarchical directory structure under /root that
consists of one directory containing subdirectories by using cd and
mkdir
the mkdir command created the directories while the cd command changes which directory you're currently in
<span>The answer is algorithm, because computer programmers need a programming language that's more similar to their native language. They then write specific steps a computer must take to complete the task at hand. Machine code is not easily memorized and is foreign to most people.</span>
