The adapters I'm looking for would allow you to plug an old-style PS/2 keyboard or mouse into a new-style USB port. One such adapter is pictured here:
But it needn't have two PS/2 connectors (one is enough) and it doesn't necessarily have to include any length of cable. I need three separate adapters for the three machines, but they don't need to match each other in appearance.
Much thanks for any help!
John