During the period of 1963 to 1968, the ISO draft standards supported the use of either CR+ LF or LF alone as a newline, while the ASA drafts supported only CR+ LF. ASCII was developed simultaneously by the International Organization for Standardization (ISO) and the American Standards Association (ASA), the latter being the predecessor organization to American National Standards Institute (ANSI). Later, in the age of modern teleprinters, standardized character set control codes were developed to aid in white space text formatting.
In particular the Morse prosign BT (mnemonic break text) represented by the concatenation of literal textual Morse codes 'B' and 'T' characters sent without the normal inter-character spacing is used in Morse code to encode and indicate a new line or new section in a formal text message. In the mid-1800s, long before the advent of teleprinters and teletype machines, Morse code operators or telegraphists invented and used Morse code prosigns to encode white space text formatting in formal written text messages.
