All the computers that I've had (desktops and laptops) are/have been supplied with similar cables to the one on the right except in black colour.
They do when they connect a new dwelling up to the pole for the first time. They actually don't like it when things explode in their face. For some strange reason!
These are the leads which were supplied with my "Houseworth" halogen oven (left) and my "Phillips" rice cooker (right). As they are interchangeable I use the right hand lead for both.