nonUSB
NonUSB is a descriptive label used to denote devices, peripherals, interfaces, or connectors that do not use the Universal Serial Bus (USB) standard for data transfer or power. It is not an official standard; rather, it groups technologies by what they lack rather than what they share.
Common non-USB interfaces include serial connections such as RS-232 and RS-485, parallel ports, SCSI, IDE (PATA),
Non-USB solutions are chosen for several reasons, including lower latency, greater tolerance to electrical noise, simplicity
Overall, non-USB describes a broad, informal category rather than a single standard, reflecting the long-running coexistence