There are several meanings of parallel device. It can mean having two or more computers working on the same problem at the same time. This is called parallel computing.
Or it can mean any device hooked up to the parallel port on a computer. Parallel ports are fairly obsolete, so you are less likely to see this version of parallel device in the future.
Depends, is the device serial or parallel?
serial device
Serial
In a parallel circuit, each branch has its own current flow, so there isn't a single device that has the smallest current. The current through each device is determined by its resistance and voltage applied. The device with the highest resistance will have the smallest current flowing through it in a parallel circuit.
A capacitor
No, a fuse will not work successfully if it is connected in parallel with the device it is supposed to protect. Fuses are designed to be connected in series with the device, allowing them to interrupt the current flow when an overcurrent condition occurs. If connected in parallel, the fuse would not experience the same current as the device, and it would not protect it effectively from overcurrent situations.
Serial ports only allow one device to send and one device to receive at a time, where a parallel port can send and receive data at the same time.
it is used to interface between controller and peripheral device.. peripheral device otherwise called external device such as LED,LCD...
A capacitor
A fuse will not work successfully if it is connected in parallel with the device it is supposed to protect.First, it will blow because it has no resistance in series with it. Second, once it blows, the device still has power applied to it. Fuses must be wired in series.
A printer
The USA plug type for this electronic device is Type A, which has two flat parallel prongs.