It isn't. The image in the OP is not meant to be taken seriously, but even if it was, the USB stick wouldn't work. USB to PS/2 to 9 pin serial to 25 pin serial to parallel. It will fall at the first hurdle because the PS/2 adapter won't transfer data from the USB stick. I'm also don't think either the serial or parallel adapters would be able to transmit meaningful signals from the USB stick. Furthermore, parallel ports don't have any power pins, so the USB stick wouldn't even be able to power up. However, note the two empty USB slots just to the left of that monstrosity.

If you really needed to use an old computer with no USB functionality, you can buy a USB to header connector for less than 10 bucks or a USB PCI card for less than 20 bucks.