Tanakh [תנ״ך] (also spelled as Tanach) is an acronym for the Hebrew Bible that is based on the initial Hebrew letters of each of the text's three parts:

1. Torah [תורה] meaning one or all of: "The Law"; "Teaching"; "Instruction". Also called the Chumash [חומש] meaning: "The Five"; "The five books of Moses". It is the "Pentateuch".
2. Nevi'im [נביאים] meaning: "Prophets"
3. Ketuvim [כתובים] meaning "Writings" or "Hagiographa".
   

The threefold division reflected in the acronym Tanakh is well attested to in documents from the Second Temple period and in Rabbinic literature. However, during that period, the proper term was Miqra [מקרא] ("Reading") was used instead of the acronym Tanakh.