Unit 18: Vocabulary

Please study the 11 vocabulary terms below and press the Mark Complete button to continue.
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BD (Blu-Ray Disc)
an optical read-only disc storage media format used for data or movie storage with the same dimensions as a standard DVD or CD; holds up to 50 GB or 6 times the storage of a DVD
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The name Blu-ray Disc comes from blue-ish colored laser used to read and write data to this type of disc.
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CD-ROM (compact disc read only memory)
an optical storage medium which can store approximately 650 MB of read-only data
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The CD-ROM has almost been completely replaced by the much more efficient DVD-ROM technology.
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CD-R (compact disc recordable)
an optical, recordable storage medium that allows a user to write one time up to 650 megabytes of data
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The nervous author backed up his novel every day on a new CD-R.
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DVD (digital versatile disc)
a portable storage medium which can hold between 4.7 and 17 gigabytes of data, often used for storing movies, games, and operating systems
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The salesperson said that once he saw a film on DVD, he was never satisfied with VHS technology again.
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DVD-R (digital versatile disc recordable)
a portable recordable storage medium which allows a user to write one time up to 4.7 gigabytes of data
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DVD-R discs are a cheap way to make backups of larger files and folders.
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diskette
a portable magnetic storage media enclosed in a plastic sleeve, typically holding 1.4 MB of data
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Diskettes are getting rare these days and have all but been replaced by USB flash memory drives.
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flash drive
a USB device used for portable data storage, typically between 1 gigabyte and 1 terabyte in size; also known as a USB drive, jump drive, thumb drive, and even a key drive
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The man stopped using his floppy disk drive for good when he found out that flash drives are faster, more reliable, and have greater storage capacity.
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medium
a physical transmission device or storage device of information
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Digital distribution over a network is rapidly replacing removable storage media such as CD-ROM's and DVD-ROM's.
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punch card
a stiff piece of paper on which data can be recorded in the form of holes
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My grandfather told me when he studied computer science they used punch cards to store programs.
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SD (Secure Digital)
a non-volatile memory card standard format developed for use in portable devices like cameras
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SD cards are available in different sizes and speeds, including SDHC, MicroSD and MicroSDX.
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tape drive
a legacy storage device using magnetic ribbon inside a plastic cassette
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The system administrator does a DVD-R backup every week, because it's cheaper and more reliable than using a tape drive.
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