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Small Computer System Interface (SCSI)
A serial port is an interface in which one bit of data is transmitted at a time.
An I/O interface is a facility on a computer system for input and/or output of data. An example is a USB port on a PC.
A user interface (UI) is the part of an operating system, program or device that the user uses to input and receive data
For detail information about computer data interface visit the following link named
"Computer Data Interface"