Variable names were limited to A to Z, A0 to A9, B0 to B9, ..., Z0 to Z9, giving a maximum of 286 possible distinct variables. FORTRAN's odd system for setting up the variables I through N as integers and the rest as floating point was removed, and all variables were assumed to be floating point and dimensioned with up to 10 elements. The codice_13 command was only required if the array held more than ten elements. Array names were restricted to A to Z only.