Article: Despite being an original story, Spectre draws on Ian Fleming's source material, most notably in the character of Franz Oberhauser, played by Christoph Waltz. Oberhauser shares his name with Hannes Oberhauser, a background character in the short story "Octopussy" from the Octopussy and The Living Daylights collection, and who is named in the film as having been a temporary legal guardian of a young Bond in 1983. Similarly, Charmian Bond is shown to have been his full-time guardian, observing the back story established by Fleming. With the acquisition of the rights to Spectre and its associated characters, screenwriters Neal Purvis and Robert Wade revealed that the film would provide a minor retcon to the continuity of the previous films, with the Quantum organisation alluded to in Casino Royale and introduced in Quantum of Solace reimagined as a division within Spectre rather than an independent organisation.

Question: Quantum is a division of what other organization?
Spectre