DITLOIDS (Last Call for Help :) )

[Nannie1959]

I am reposting these for the last time, I promise:
I am trying to help my Mum out with a ditloid quiz here, but it seems impossible for our brains...lol. Below are the few we are well and truly stuck on, any help will be very much appreciated...Thanx in advance :)

4. 8 D in an O D U
5. 1874 A B C D E: ‘M W, C H, I W to S Y'
6. A W D 6442 to E the M of M
8. 20 M of the T B T P S

One kind person on here suggested that number 5 was about Alexander Graham Bell and the Mr Watson Quote :) .... The Quote fits in with the "M W, C H, I W to S Y" but for the life of me cant work out the ABCDE: My daughter suggested it is Alexander Bell Called Directory Enquiries...lol (I hope she was joking...sigh)

[Nannie1959]

Any one??? :(

[mrchirpy]

Number 5 is something to do with Alexander Graham Bells first telephone message, i.e. "Mr. Watson come here, I want to see you". But other sources give the year as 1876, so I can't get any nearer.