lecture4 Data and Graphics 2011

Commonnomenclaturetodayistodefinememory

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Unformatted text preview: 256 values ( 0­255) Nomenclature Nomenclature A BIT is a single 1 / 0 position A NIBBLE is 4 BITS A BYTE is 8 BITS A WORD is a multiple of BYTES eg: 16 bits, 32 bits, 48 bits, 64bits………. Common nomenclature today is to define memory storage and data capacity in BYTES More Nomenclature More Nomenclature As computers have become capable of processing and storing more data, we have coined: KiloBytes (Thousands) MegaBytes (Millions) GigaBytes (Billions) TeraBytes (Trillions) –Library of Congress 30Tb PetaByte (1000 Trillion) ExaByte (Million Trillion) Base 2 (Binary) vs. Decimal Comparison Base 2 (Binary) vs. Decimal Comparison 10n = 10 105 10 100,000 100,000 104 10,000 27 n 2= 26 25 128 128 64 64 32 103 1000 102 100 24 23 16 101 10 100 1 22 8 21 20 4 2 1 Representing Data in the Computer Representing Data in the Computer Internally, everything­­data, programs, text, you name it­­is represented in bits. With an array of bits, we can represent any number or, thru assignment, any character so, for example: 0011 0000 = decimal 48 = “H” (256 combinations, 0 to 255) How coul...
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This note was uploaded on 03/03/2013 for the course CSCI 0020 taught by Professor Stanford during the Spring '08 term at Brown.

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