34. Lower-case commands ~~~~~~~~~~~~~~~~~~~ You will know that whereas VDU and PRINT are BASIC keywords, vdu and print are not. However, with the MOS 'Star' commands, *FX, *SAVE, *DELETE etc., lower-case is treated the same as upper-case. Thus *fx0 and oPt1,2 are valid commands. Further to this, disc filenames, though not cassette filenames, are treated in a similar fashion. Thus if you save a program as "sneaky", it appears in lower-case in the catalogue, but you can reload it as "SNEAKY" if you wish, and any attempt to save a program called "SNEAKY" would overwrite the lower-case one.