Re: Upside down 3.5" floppies
Here in Right Pondia, it's *always* disc *except* for floppy and hard disks. We acceded to Left Pondia on the spelling for those specific items. Most optical formats like CDs etc are discs, not disks though. Not so sure on the magneto-optical jobbies.
Likewise, computer "programs". All other uses of the word "programme" is spelled as...er...programme, eg TV programmes, Theatre programmes etc :-)