Page 9 - Digi Notes : Computer - 01.12.2015
P. 9
OPTICAL DISC
Optical storage refers to the storage of data on an optically readable
medium by laser beam.
CD (COMPACT DISC)
CD is made polycarbonate plastic material and aluminium coated. CDs
have a capacity of about 700MB.
DVD (Digital Versatile Disc)
It is an optical disc like the CD, but with much higher capacity.
DVD can store about 4.7GB.
BRD (Blue Ray Disc)
Blu-ray Disc is a high-density optical disc format similar to DVD .It’s
capacity is up to 50GB to 100 GB.
HVD (Holographic Versatile Disc)
The Holographic Versatile Disc (HVD) is an optical disc technology It’s
capacity is 6 TB.
Flash memory
Flash memory is an electronic non-volatile computer.
Ex Pen drive, memory card. Latest version of pen drive is 3.1 and
latest version of memory card is class 10 ultra.
Optical storage refers to the storage of data on an optically readable
medium by laser beam.
CD (COMPACT DISC)
CD is made polycarbonate plastic material and aluminium coated. CDs
have a capacity of about 700MB.
DVD (Digital Versatile Disc)
It is an optical disc like the CD, but with much higher capacity.
DVD can store about 4.7GB.
BRD (Blue Ray Disc)
Blu-ray Disc is a high-density optical disc format similar to DVD .It’s
capacity is up to 50GB to 100 GB.
HVD (Holographic Versatile Disc)
The Holographic Versatile Disc (HVD) is an optical disc technology It’s
capacity is 6 TB.
Flash memory
Flash memory is an electronic non-volatile computer.
Ex Pen drive, memory card. Latest version of pen drive is 3.1 and
latest version of memory card is class 10 ultra.
