It would be considered a storage device as you can give or receive information from the device.
The Difference of an mp3 and mp3 recorder is the mp3 is a electronic portable. An mp3 recorder is an electronic divice like an mp3 but you'r allowed to record
SuperSonic makes several portable cd players with digital output SC-725,SC-505,and SC-502
No. Blu-Ray discs are not DVDs and they will only work on Blu-Ray players. But there are portable Blu-Ray players
The iPod Nano is made by Apple and is a portable media player. It has several features including a music player, video player, storage for photos, and Bluetooth technology.
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.
Portable media player was created in 2002.
A DVD is relatively portable but I suspect you mean a DVD player? In which case it's only portable if it's a portable DVD player.
One example of a portable media player is an ipod.
A car player means that the player is built into the car. A portable DVD player can only be played in the car by connecting a DV-power cable to the car battery.
my dvd player is so big that it is not portable.
A CD-ROM (using a player) is an input device because it holds information that is readable. There are writable and re-writable CD's which allow you to add or remove information making it an output device (storage device) as well.
The most portable mp3 player is Philips SA1929/37 2 GB Flash Audio MP3 Player.