there is an app called pouncer
Servers
Servers
The best way to communicate with your other personal computer when away is through remote sharing. Most computers have the ability to enable remote sharing with password set-up to allow communication from other devices and locations.
A modem
by email and other radio devices
Kilalakita
BUSEach channel, called a bus, allows the various devices both inside and attached to the system unit to communicate with each other
serial port to communicate between CPU with other devices such as printer
network
SANs. (Storage Area Networks.)
You must enter the CMOS setup in order to enable or disable onboard drive controllers and other embedded devices.
It is software that directly interacts with your hardware to enable serial communications to other devices.