400-499
- RS-422 (or EIA-422 or TIA-422), electrical characteristics of the balanced voltage digital interface circuit (serial data communications)
- RS-423, a standard for serial communications
- RS-449 for serial data communications
- EIA-485 RS-485 multi-point electrical characteristics of the balanced voltage digital interface circuit (serial data communications)
- RS-494 A 1983 Binary Cutter Location (BCL) standard for CNC
Read more about this topic: EIA Standards