both input r output
a CD is an output device that can be used as a storage or input device
A normal CD drive is an input device. A CD-R or CD-RW drive would do both input and output.
software
Because the r not the same
G. R. West has written: 'An interregional input-output table for Queensland, 1978/79'
I would say that a CD-ROM is a form of input, as it is "read only memory" and the data on it can only be read, but not written to. If you're talking about CD-R/CD+R drives, then those would be considered both input and output, as it can read from a CD, and writes to CD.
If you are talking about off-the-shelf DVD players then it's an output device( display data read to video terminal [i.e. Projectors, TV's], but if you are talking about DVDRW devices then it's an input and output device. If you are talking about a DVD media, if it's just ordinary DVD-ROM then it's just input. But if you're talking about DVD-R or DVD-RW media then it's an input and output media.
If you are talking about off-the-shelf DVD players then it's an output device( display data read to video terminal [i.e. Projectors, TV's], but if you are talking about DVDRW devices then it's an input and output device. If you are talking about a DVD media, if it's just ordinary DVD-ROM then it's just input. But if you're talking about DVD-R or DVD-RW media then it's an input and output media.
Transmission line efficiency is power at the recieving-end of the line compared to the power at the sending-end of the line and is expressed as a percentage, so this can be formulated. % efficiency = load power (output) / source power (input) x 100 In the line, there are power losses. to calculate this we use the formula: power loss = 3.I2.R where I is current and R is resistance. Now that we have the losses, we know the difference between the input and the output. So, for example, if one had the output value known, then to get the input we just add the loss to the output or if had the input known, just subtract the loss from it to get the output. hope that helps
If you are talking about off-the-shelf DVD players then it's an output device( display data read to video terminal [i.e. Projectors, TV's], but if you are talking about DVDRW devices then it's an input and output device. If you are talking about a DVD media, if it's just ordinary DVD-ROM then it's just input. But if you're talking about DVD-R or DVD-RW media then it's an input and output media.
It can be both, depending on where it is in the process. In most cases, it will be an output into another device, so it would be plugged into the input of the other item. In a typical cable TV set up, the cable would go into the input of the DVD and the output of the DVD would go to the input of the television.