In response to the advent of software defined world, this Fast Abstract introduces a new notion, information gravitation, with an attempt to unify and expand two related ones, information mass (related to the supposed fifth force) and data gravitation. This is motivated by the following question: is there a new kind of (gravitational) force between any two distinct pieces of information conveying messages. A possibly affirmative answer to this question of information gravitation, which is supposed to explore the theoretically and/or experimentally justified interplay between information and gravitation, might make significant sense for the software defined world being augmented with artificial intelligence and virtual reality in the age of information. Information induces gravitation. Information gravitation should be related to Newton s law of universal gravitation and Einstein s general theory of relativity, and even to gravitational waves and the unified theory of everything.