This is a Keyboard.
You use it to type anything on the computer.
Now What happens when you type incorrectly?
You press backspace and retype it again.
This is a Stenotype.
for example, a journalist typing down a speech. He needs accuracy and speed while typing. He can’t have the politician repeat his words again and again. They have a specific set of letters from the above set which have a specific meaning. They type that.
What if they make a mistake? They have a key the middle key in the original typewriter picture for space.
But where is the backspace?