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Byte Chart - Jargon

 

  
Abbreviations like Kb, KB, Mb and GB are often confused, misunderstood or used incorrectly. Here is a brief explanation of proper usage.
 

The only data that a computer can understand is on and off. But those two simple commands can be grouped into millions of combinations and it is the way they are grouped in series that creates complex data.

The basic unit is called a bit (binary digit). Each bit has an electronic switch, or gate. If the gate is open the bit is on and electricity can go through. The computer reads on or open switches as a number 1. If the gate is closed or off, the electricity is blocked and the computer reads off bits as 0.

Bits can be grouped together to allow more complex code. Eight bits are grouped together to form a byte. This allows 256 possible combinations of 1/0. The abbreviation for bit is a lowercase "b"; the abbreviation for byte is an uppercase "B". Bits and bytes can then be expressed in larger measurements. They are generally expressed in exponents of two, known as binary code.

   

TidBits about Bits - Bytes - Nibbles and the "Power of Twos"

  • The text of a thirty volume Encyclopedia would use about 1GB ASCII Storage.
  • The width of a "Word" is only generally 32 bits (depending on hardware)
b Bit  20 Two to the 0 power = 1 (true) or 0 (false)
  Nibble  22 Two to the 2 power  = 4 bits
B Byte  23 Two to the 3 power = 8 bits = 1Byte
  Wyde or Halfword 24 Two to the 4 power = 16 Bits
  Word  25 Two to the 5 power = 32 Bits
  Double or Double Word 26 Two to the 6 power = 64 Bits
  Quad or Quad Word 27 Two to the 7 power = 128 Bits
Kb Kilobit  210 Two to the 10th power = 1024 bits = 1.024Kb
KB Kilobyte  210 Two to the 10th power = 1024 Bytes = 1.024KB
MB Megabyte - Megs 220  Two to the 20th power = 1,024 KB = 1,048,576 B
GB Gigabyte - Gigs 230 Two to the 30th power  = 1,024 MB = 1,048,576 KB
TB Terabyte  240  Two to the 40th power  = 1,024 GB = 1,048,576 MB
PB Petabyte 250 Two to the 50th power  = 1,024 TB = 1,048,576 GB
EB Exabyte 260 Two to the 60th power = 1,024 PB = 1,048,576 TB
ZB Zettabyte 270 Two to the 70th power  = 1,024 EB = 1,048,576 PB
YB Yottabyte 280 Two to the 80th power  = 1,024 ZB = 1,048,576 EB
NB Nonabyte?  290 Two to the 90th power  = 1,024 YB = 1,048,576 ZB
DB Doggabyte?  2100 Two to the 100th power  = 1,024 NB = 1,048,576 YB
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