A passive USB-to-PS/2 converter

A passive converter refers to a simple device designed to merely change the port of a keyboard's cable. This excludes the translation of the keyboard's protocol, which is a task usually done by an active converter instead.

Thanks to their simplicity, passive converters are often more affordable than active converters, but their practical uses can be very limited.

A passive AT-to-PS/2 converter

Although backwards compatibility is rare among protocols, the PS/2 protocol stands out as a prevalent example as it can interpret an AT keyboard. Furthermore, an active PS/2-to-USB converter can be used afterwards to practically convert an AT keyboard into USB.