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How much is 421.330 megabytes?

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It's about three-fifths as much as a Compact Disc.
In other words, 421.330 megabytes is 0.57140 times the amount of a Compact Disc, and the amount of a Compact Disc is 1.750 times that amount.
(80-minute, 360,000 sector disc; "Red Book" specifications)
A typical, 80-minute capacity compact disc, commonly known as a 700 megabyte (mB) disc will actually hold 737.3 megabytes (mB) of data. Such disks are 1.2 mm (0.047 in) thick.
It's about one-tenth as much as an HDTV Television Show (30 Minutes).
In other words, 421.330 megabytes is 0.0975 times the amount of an HDTV Television Show (30 Minutes), and the amount of an HDTV Television Show (30 Minutes) is 10.30 times that amount.
(a.k.a. High Definition television, a.k.a. HD) (digital signal, QAM-256; 30 minutes)
Broadcast cable HDTV signals contain about 2.4 megabytes (mB) of data per second, or 4,320 megabytes in a thirty-minute television show. The first High Definition television broadcast was news footage from John Glenn's 1998 mission on the space shuttle Discovery.
It's about one-tenth as much as a DVD.
In other words, the amount of a DVD is 11 times 421.330 megabytes.
(a.k.a. digital video disc) (single-side, single-layer; DVD-5 specification)
A typical capacity digital video disc will hold 4,800 megabytes of data. Such disks are 1.2 mm (0.047 in) thick.
It's about 80 times as much as The Complete Works of William Shakespeare.
In other words, 421.330 megabytes is 79 times the amount of The Complete Works of William Shakespeare, and the amount of The Complete Works of William Shakespeare is 0.013 times that amount.
(ASCII, plain text)
The Complete Works of William Shakespeare would occupy about 5.3 megabytes (mB) when written in plain text without formatting. These works include 38 definitively-attributed plays — 11 tragedies, 17 comedies, and 10 tragedies — as well as 154 sonnets and numerous other poems.
It's about 100 times as much as a MP3 Song.
In other words, the amount of a MP3 Song is 0.01 times 421.330 megabytes.
(a.k.a. MPEG-1 Audio Layer 3, a.k.a. MPEG-2 Audio Layer 3) (128 Kbps, "near-CD-quality"; 3 minutes duration; average)
A three-minute song of typical quality will be about 3 megabytes (mB) when encoded into MP3 format. The song Tom's Diner by Suzanne Vega was used by AT&T-Bell Labs engineer Karlheinz Brandenburg to test the compression process and is considered the first MP3 song.
It's about one-one-hundredth as much as a Blu-ray Disc.
In other words, 421.330 megabytes is 0.0083 times the amount of a Blu-ray Disc, and the amount of a Blu-ray Disc is 120 times that amount.
(a.k.a. BD) (dual-layer; Blu-ray disc)
A typical Blu-ray disc will hold 51,000 megabytes of data. The increase in capacity versus a standard DVD is possible because of the smaller wavelength of blue light — 405 nanometers instead of 650 nanometers for the red laser light used in a DVD.
It's about one-one-hundred-fiftieth as much as Wikipedia.
In other words, the amount of Wikipedia is 130 times 421.330 megabytes.
(2009 figures) (all languages)
As of 2009, Wikipedia held 54,000 megabytes of publicly written and edited encyclopedia articles on 14.5 million subjects as well as associated commentary and discussion. Wikipedia is among the ten most popular websites on the Internet and the only non-profit entity in that group.