Halman is a life-form whose identity is the combination of HAL 9000 and David Bowman merged together. The incident appeared to have happened in 2010 when Lucifer came to light. Halman is introduced in the novel, 3001: The Final Odyssey.
3001: The Final OdysseyEdit
Halman came into being at the end of 2010 when Bowman ascended to a higher order of existence through the Monolith, which merged him with HAL, moments before Discovery-1's destruction, during the creation of Lucifer.