How the Humble Compact Disc Works. by Michael Eiser

12. Use the uniq command to remove the duplicate lines in the CD_list file, placing the corrected information in a file called CD_list_new.

DataStor, a data storage device and media manufacturer, produces a compact hard drive called DS1000, which stores 1GB of data. Their primary customer is Four-D, a national reseller of the drives.

There are many sub-groups of these discs, but the main types of discs are CD, DVD, and Blue-ray. The optical disc is placed into a DVD recorder and information is written to the disc. The data is written in contiguous format on the disc. A recorder will not write data to an optical disc if that data is bigger than the optical disc. A DVD disc can handle a data amount of 4.88 GB. The compression of an optical disc is handled by the program that is used to burn the disc. The data is written to an optical disc using a laser. This laser burns the data into the bottom of the disc. The use of different wave length of the laser actual help burn more data into the bottom of the disc. However, the drawbacks of an optical disc are that they cannot be placed in direct sunlight. The plastic that the disc is made of can warp in sunlight and corrupt the data on the disc. There is also the problem of scratches and dents making the surface of the disc hard for the laser to read.(AMERICAN,

Q5: Data storage capacity: Data stored on DVDs = 8.54 Gbyte = 8.54 x (1024) ^3 x8 =73358041415.68 =73.36 x10^9 bits Number of DVDs = (10^4kg)/15g = (10^4 x 10^3 g)/15g = (10^7)/15 =

a. By reading the file system’s directory information, which is stored on the storage device

If the audio CD produced an “ERROR” code when you tried to listen to it then it must be caused by a scratch in the CD because a scratch in the CD would allow the audio data to be lost.

Staffs use this DVD WRITER to get the data from the CD ROM to the PC because of store the assignments of students, so readable CD ROM is much enough because ofto do there day official activities.

DISC Profiles. (2013, September). Different DiSC Profile Behavioral Styles – Learn In Different Ways. Retrieved September 8, 2103, from http://www.discprofiles4u.com/blog/2012/different-disc-profile-behavioral-styles-learn-in-diffe

There are three types of storage devices. Magnetic storage devices store data as magnetic dots on spinning disks. These dots are written and read by an electromagnet. Examples of magnetic storage devices include Hard Drives (HDD) and Floppy Disks. Optical storage devices store data as coloured dots or small indentations on spinning disks. This data

DVD (digital video disc) come in a variety of recording options and can store 9.4 GB, more advanced DVDs has the capacity of 50GB. CD (compact disc) come in several types: CD-ROM, CD-R and CD-RW.

After a couple of “failed” attempts of making a device that could be used for mass sharing of music in the late 1800s, an immigrant from Germany had finally come up with an idea that would change everything. Chichester Bell (Alexander Graham Bell's cousin) and Thomas Edison’s idea to record sounds on round cylinders was a good idea except for the sound quality and general effort that was required to make and replicate sound. The Phonograph was one of the earliest attempts at recording devices. Thomas A. Edison wanted to create this device in order to assist with business interactions. He originally used foil to record sounds, but this wasn't the best medium. You could only play sounds once and the quality wasn’t the greatest. This is when wax cylinders came into play. It was eventually decided that the wax cylinder wasn't strong enough to record something permanently. Next followed the graphophone. This invention by Bell fixed the replay problem, but mass production of music would’ve been impossible because of the sheer amount of work involved in recording each cylinder separately (Bells).

Most of a CD consists of an injection-moulded piece of clear polycarbonate plastic. During manufacturing, this plastic is impressed with microscopic bumps arranged as a single, continuous, extremely long spiral track of data circling from the inside of the disc to the outside. Once the clear piece of polycarbonate is formed, a thin, reflective aluminum layer is put onto the disc, covering the bumps. Then a thin acrylic layer is sprayed over the aluminum to protect it, and the CD label is printed onto the acrylic. The compact disc was first used for audio storage only, but are now used to store audio, video, text, and any other information in digital form, and are able to hold 783 megabytes in all.

It is the type of disk in which the space is fixed. it doesn’t matter how much data you store.

   Abstract: This essay deals with the creative possibilities generated by the influx of inexpensive and easy to use digital recording software, hardware, and digital distribution techniques.  One of the main themes of the essay is the problem of upholding creativity and artistic integrity in an unmediated digital environment.

This patent protects many different items relating to this electronic mounting device. The main protection covers a device made of three elements: part that is inserted into a CD player, one that extends outward attached to the first, and one that has a way to attach a PED to the second. This device is used in vehicles and is located in front of the audio controls on that vehicles’ dashboard. The first element can be either wedge shaped or comprised of two parallel plates capable of separation, and can be adjusted either manually or automatically. Extending from the first is the second element in a coplanar arrangement and the whole device can be made of a flexible material so the PED can be adjusted for the best location per person and different CD player arrangements. The device to hold and/or secure the PED is a