CD vs CDR
Summary: Difference Between CD and CDR is that a CD or also known as COMPACT DISC is small and portable round medium disc made of Molded Polymer used for storing data or information electronically. While CD-R (compact disc-recordable) is a multisession optical disc on which users can write, but not erase, their own items such as text, graphics, and audio.
A CD or also known as COMPACT DISC is small and portable round medium disc made of Molded Polymer used for storing data or information electronically. The Size of Compact Disc is closed to Floppy disk, but you can store audio files, pictures, videos, text and other data too in CD electronically. You can also save other information as well in Digital Form. Tape Cartridges have been replaced by CDs because now people keep CD to play music at home instead of tape cartridges. Initially CDs were only Read-Only type, user can’t write the data on it but can read the Data saved in CDs. But now, users can record data in CD’s too. The process of writing data electronically can only be done by CD-R or CD-RW.
A CD-ROM, or compact disc read-only memory, is a type of optical disc that users can read but not write (record) or erase — hence, the name read-only. Manufacturers write the contents of standard CD-ROMs. A standard CD-ROM is called a single-session disc because manufacturers write all items on the disc at one time. Software manufacturers often distribute programs using CD-ROMs. A typical CD-ROM holds from 650 MB to 1 GB of data, instructions, and information. To read a CD-ROM, insert the disc in a CD-ROM drive or a CD-ROM player. Because audio CDs and CD-ROMs use the same laser technology, you may be able to use a CD-ROM drive to listen to an audio CD while using the computer.
Many people use archive discs or Picture CDs to preserve their photos. When you post and share photos online on a photo sharing community, you can choose to save your collection of online photos on an archive disc, which stores photos in the jpg file format. The cost of archive discs is determined by the number of photos being stored. One service, for example, charges $9.99 for the first hundred pictures.
Many personal computers today include either a CD-R or CD-RW drive, or a combination drive that includes CD-R or CD-RW capabilities, as a standard feature. Unlike standard CD-ROM drives, users record, or write, their own data on a disc with a CD-R or CD-RW drive. The process of writing on an optical disc is called burning. A CD-R (compact disc-recordable) is a multisession optical disc on which users can write, but not erase, their own items such as text, graphics, and audio. Multisession means you can write on part of the disc at one time and another part at a later time. Each part of a CD-R can be written on only one time, and the disc’s contents cannot be erased.