In computer an video games, power-ups are objects that instantly benefit or add extra abilities to the game character. This is contrast to an item, which may or may not have a benefit and can be used at a time chosen by the player. Although often collected directly through touch, power-ups can sometimes only be gained by collecting several related items, such as the letters of the word 'EXTEND' in Bubble Bobble. Well known examples of power-ups that have entered popular culture include the power-pills from Pac-Man and the Super Mushroom from Super Mario Bros.