https://religion.wikia.org/wiki/Tanakh#:~:text=According%20to%20the%20Talmud%2C%20much,and%20have%20since%20remained%20unchanged.
Excerpt:
[ The Tanakh is also called Mikra (מקרא, meaning "reading" or "that which is read"). The three-part division reflected in the acronym "Tanakh" is well...