On the Model 33 ASR that I learned programming with, we were taught to type CR LF RUBOUT at the end of each line when punching a tape. RUBOUT is like a no-op ch

On the Model 33 ASR that I learned programming with, we were taught to type CR LF RUBOUT at the end of each line when punching a tape. RUBOUT is like a no-op character which is ignored by the receiving end, so it gave a little extra time for both the carriage return and line feed to complete. RUBOUT is also how you would correct a typo on the tape: you would backspace the tape punch, hit RUBOUT, and then the character you meant. The RUBOUT character had all holes punched, effectively erasing the typo. When operating the remote computer interactively, we just had to type CR, as the remote system would provide the LF and a slight pause. Working directly on the remote timesharing was strongly discouraged, as dial-up time cost $30/hour back then, or about $250/hour in today's dollars. So we would punch our code on a tape, dial in just long enough to run the tape and get our printout, and hang up right away.