These patents covered the 6800 bus and how the peripheral chips interfaced with the microprocessor. The COM ports are interfaced by an integrated circuit such as 16550 UART. MRP II is by definition fully integrated or at least fully interfaced. Fully electronic knitting machines can be interfaced to computers running computer-aided design software. Lightpipe devices have been successfully interfaced via FireWire. Peripherals interfaced to the system via "channels". Arduino boards have been interfaced to electronic knitting machines to further automate the process. The resulting material may be interfaced to an external device via a stopcock intermediate. These buttons or switches are interfaced with an electrical or electronic interlocking. MCAs are typically interfaced with via USB, RS-232 or Ethernet, but can use PCI also. Although many B2B e-commerce suppliers claim to be integrated, most web stores are interfaced. Alternatively, a standalone TLC2 of the traditional type could be interfaced if it was required. During World War II, pitometer logs were often interfaced directly into warship fire control systems. The LIS is often interfaced with the hospital information system, EHR and/or Laboratory instruments. Some providers have interfaced gas and water meters to feed into a PLC type system.