Joseph wrote: 

The Torah and the Tanahk (the Bible): Are they fundamentally related?

Gidon responded:

Hi Joseph,

The Tanakh (TNK) is actually a three volume set, comprised of three books, named for the first letter of each in order:
Torah (5 books of Moses)
Neviim (prophets)
Ketuvim (writings)
the letters a and h in Tanakh are vowels or relatively immaterial modifiers in Hebrew

Hope this helps!