Final answer:
The three operations of each parallel I/O port are read, write, and control, which involve acquiring data, sending data, and configuring the port or connected device, respectively.
Step-by-step explanation:
The subject of this question is Computers and Technology. The three operations of each parallel I/O port are read, write, and pin. Read operation is used to read data from a port, write operation is used to write data to a port, and pin operation is used to manipulate the pins of a port.
The question pertains to the operations of a parallel I/O (Input/Output) port. There are typically three main operations associated with each parallel I/O port: read, write, and control. When you read from a port, you are acquiring data from the I/O device connected to the port. To write refers to sending data to the I/O device. The control operation usually involves configuring the port or the device connected to it, such as setting data directions or modes (input or output).