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How much is 72,200 gigabytes?

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It's about 30,000,000,000 times as much as a Page of Text.
In other words, 72,200 gigabytes is 32,000,000,000 times the amount of a Page of Text, and the amount of a Page of Text is 0.0000000000310 times that amount.
(50 lines, 50 characters per line, ASCII encoding)
A 50-character-per-line, 50-line page of Latin alphabet text requires 0.00000230 gigabytes when digitally represented. The Google Books project, which has produced hundreds of millions of pages of digital text, used a robotic device to digitize over eight million titles at a rate of about 1,000 pages per second.
It's about 700,000,000,000 times as much as a Magnetic Stripe Card.
In other words, the amount of a Magnetic Stripe Card is 0.000000000001000 times 72,200 gigabytes.
(maximum capacity; per ISO 7811 specification)
The storage capacity of a magnetic stripe on a credit or identification card is about 0.0000001000 gigabytes. According to legend, Forrest Parry, the IBM engineer who developed the first magnetic stripe card in 1960, was able to solve the problem of adhering the strip to the card after his wife suggested using an iron.