Two major additions were made during the development. The first addition was string variables, along with changes to the codice_26 statements to allow strings to be stored in them and the codice_29 statement to read them in interactively. One feature of the string system was that trailing spaces were deliberately ignored in comparisons, so that "YES" and "YES " were considered equal. This was later realized to be a grave error. This version also added the semicolon to codice_4 statements to do "close packing" of output.