In a world where outlets are still to scarce, or, at the very least, not well distributed enough, the extension cord for laptops in particular has become absolutely essential.  I, personally, always have my extension cord attached to my laptop charger in order to ensure that I can charge my computer from as far a distance from the closest outlet as possible.  That being said, the functionality of extension cords in by no means limited to on-the-go laptop charging.  Of course these same types of cords play an instrumental role in setting up permanent technology systems in homes, whether these systems be televisions, sound systems or anything in between.