The major change was the introduction of file handling. Previously any pre-defined data that had to be used in the program had to be placed in the codice_12 lines and then read in one-at-a-time using the codice_11 command. This extension allowed files to be accessed and read in a similar fashion. The codice_29 command could now be used to read a single item from a file, while codice_4 would write one. For random access, the codice_11 could now be positioned anywhere in the file with the codice_50 command, while codice_51 would write at that location. The current location was returned by the codice_52 function, and the file length by codice_53. One could also test if you were at the end of the file during sequential reads using the codice_54.