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In computer
hardware, a port serves as an interface between the computer and other
computers or peripheral devices.
Physically, a port is a specialized outlet on
a piece of equipment to which a plug or cable connects.
Electronically, the
several conductors making up the outlet provide a signal transfer between
devices.
                                                                                                     
In computer science, porting is the process of adapting software so that
an executable program can be created for a computing environment that is
different from the one for which it was originally designed (e.
g.
different
CPU, operating system, or third party library).
The term is also used when
software/hardware is changed to make them usable in different environments.