backspace character in a sentence

1. But, if the terminal is in raw mode, the program gets the characters  ABC followed by the Backspace character and followed by  D.
2. In the C programming language ( created in 1972 ), the bell character can be placed in a string or character constant with \ a . ('a'stands for " alert " or " audible " and was chosen because \ b was already used for the backspace character .)
3. It's difficult to find backspace character in a sentence.