cheatsheet for Exam1

cheatsheet for Exam1 - Nanoseconds " Speed of light...

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Nanoseconds " Speed of light =186,000 miles/sec, (3x10 8 meters/sec) " nanosecond = 10 -9 seconds " In one nanosecond light travels 11.8 inches (30 centimeters) Kilobyte (1000 bytes) " 2 Kilobytes: A Typewritten page " 10 Kilobytes: An encyclopedic page " 50 Kilobytes: A compressed document " 100 Kilobytes: A low-resolution photo Megabyte (1 000 000 bytes) " 1 MByte: A small novel " 2 MByte: A medium-resolution photograph " 5 Mbyte: The complete works of Shakespeare or 30 seconds of video " 100 Mbyte: 1 meter of shelved books " 500 Mbyte: A CD-ROM Gigabyte (1 000 000 000 bytes) " 1 GByte: A pickup truck filled with paper " 5 GBytes: DVD " 50 GBytes: A library floor of books " 50 Gbytes: standard Blu-ray capacity Terabyte (1 000 000 000 000 byte) 1000 Gigabytes " 50000 trees made into paper and printed " 2 TB: An academic research library " 20 TB, photos/month on Facebook " 100 TB: US Library of Congress (2009) " 23 TB, video/day on Youtube (2010) Petabyte = 1000 Terabytes* = 1,000,000 Gigabytes
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