Yes Claire -

the real pedants remember that English - most 'human' (this excludes 'computer languages')languages too - come in 2 forms - spoken and written.

However, looking at modern culture all around, I'm wondering if that number should be increased - eg 'phonics' & most definitely 'txting' - which funnily enough, a few days ago there was great furore in Australia about. Some school authorities publicly stated that 'txtspell' would be accepted in written answers to tests - 'as long as the MEANING was clear'.... :-)