smart bomb

GBU is also a common shorthand form of the film The Good, the Bad and the Ugly Precision-guided munitions (smart munitions, smart bombs, guided bomb units or GBUs) are guided weapons intended to maximize damage to the target while minimizing civilian damage. Because the damage effects of an explosive weapon fall off with distance according to a power law, even modest improvements in accuracy (and hence reduction in miss distance) enable a target to be effectively attacked with fewer or smaller bombs. Thus, even if some bombs miss, fewer air crews are put at risk and the harm to civilians is somewhat reduced. The creation of precision-guided munitions resulted in the renaming of older bombs as "gravity bombs", "dumb bombs" or "iron bombs".
See more at Wikipedia.org...

Smart Bomb, also known as Smartbomb and Bombshell, is a timed puzzle videogame for the PSP developed by Core Design Ltd.. It was one of the first video games to be released on the PSP and was at first set to be a big game, yet many control flaws and repetition of levels meant that it was a relatively low selling game.
See more at Wikipedia.org...

Noun
1. a bomb that can be guided (by a laser beam or radio) to its target; "smart bombs have revolutionized aerial bombardment"
(antonym) dumb bomb, gravity bomb
(hypernym) bomb
(hyponym) laser-guided bomb, LGB