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.
False, They can use optical storage discs.
Optical Discs
no
Portable means easy to carry round, Optical means uses light to make it work. So optical media could be portable.
An optical drive is an input and output device. It reads data from optical discs like CDs and DVDs (input) and writes data to these discs (output).
Yes
Yes
A optical drive is essentially what you put CD's DVD's and install discs into.
cd, dvd, and vcd
Optical recording equipment is used to digitally store and retrieve data on optical discs such as CDs, DVDs, and Blu-ray discs. These discs use a laser to read and write data on a reflective surface, allowing for high-capacity storage of music, videos, software, and other digital content.
During the 1990's.
"Ultraviolet discs" may refer to ultraviolet light-sensitive data storage optical discs used for archival backup. These discs utilize a special coating to protect the data layer from UV light degradation. To use them, you need a compatible optical disc drive that can read and write data to these discs.