Anukramanika is the name of the first upa parva out of ninteen upa parvas in Mahabharat. Mahabharat epic has eighteen parvas and Adi parva is the first one. The original epic had been written in Sanskrit in verses. The total verses would be exceeding one lakhs.
In olden times, to be memorized by the disciples, the author cum teacher of this epic had classified the verses into several clusters, the partitions done according to the flow of events in due course of time. Parashara Rishi was the father of Veda Vyasa Rishi. Shuka Muni was the son of Veda Vyasa Rishi. Veda Vyasa Rishi himself told the entire Mahabharata to his son Shuka. Shuka told to his disciple, Suta muni. In the Anukramanika upa parva, the summary of Mahabharat had been told in brief in the sequential form like indexing the story chapters, done for convenience.
