What is in a diary name?

What letter diary do you have? 

It all started with a A-Diary, which seemed to work in most universes for most users, but soon somebody wanted to be different so they created B-Diary which was a Backup of A-Diary for LCM (Life Continuity Management) but as alway in the multiverses beings keep evolving and maturing, so er got the following letters 

• C-Diary (Computer Diary)
• D-Diary (Diary for just one Day) 
• E-Diary (Enhanced)
• F-Diary (there were several version of these all which were incompatible with each other, Family, Friends, Future..........)
• G-Diary (Limited edition for Gods)
• H-Diary (Holy or Hole-y)
• I-Diary (Interactive or Incomprehensible)
• J-Diary   (Jovial)
• K-Diary (kryptonite can't be looked at be Superman so used by Lex Luthor so superman could not find out what he was up to) 
• L-Diary (Latin)
• M-Diary (Machiavellian)
• N-Diary (Nano - very very small)
• O-Diary (Open any one can look at to see what you are doing / not doing)
• P-Diary (We are unsure if this exists, every existed or will exist as it i a Phantom diary (and not as in Phantom of the Opera))
• Q-Diary (QBT, current is full and empty and all states between) 
• R-Diary (Rubik's still not managed to open to see what is inside)
• S-Diary (Can't say anything about this one or I would have to kill you (click here to die))
• T-Diary (Tuf's diary from Tuf Insecurity)
• U-Diary (eUgene's from Manic Miner ("Eugene's Lair" / "Eugene Was Here))
• V-Diary (VWs diary which now seems to be missing since the scandal)
• W-Diary (The winklemans Dairy for those with a lazy eye, as could only be read with the lazy eye (no evidence but might or might not have been labelled after Claudia Anne Winkleman)
• X-Diary (A very thick diary covering 100's of years so that being that have an interest in Xerosere can track the plant succession from Bare Rock through to Climax)
• Y-Diary (Yahrzeit - Jewish remembrance of the first anniversary of someone's death)
• Z-Diary (Zwitterion-Diary tells the IONs which days they carry -/+ charges or both there for based on QBT)

So what next/previous? Where are you on the scale? please feel free to comment