Sculpture Made Out Of Typewriter Parts

backspace – a keystroke that moved the cursor backwards one position (on a physical platen, this is the exact opposite the space key), for the purpose overtyping a character. This could be for combining characters (e.g. an apostrophe, backspace, and period make an exclamation point - a character missing on some early typewriters), or for correction such as with the correcting tape that developed later.
carbon copy – now in its abbreviated form "CC" designating copies email messages (with no carbon paper involved).
carriage return (CR) – indicating an end line and return to the first column text.
cursor – a marker used to indicate where the next character will be printed.