Number systems, ASCII and Unicode Topic 2
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15 Terms
What is a bit?
Each individual digit in a binary value
What are bytes
bits grouped together into units
How many bits in one byte?
8 bits
Why was the International Electrotechnical Commission (IEC) established?
Bytes go up in twos and it uses different prefixes to represent multiples of base 2
What is the multiple of mebibytes?
2^20
What is the multiple of gibibytes?
2^30
What is the multiple of tebibytes?
2^40
What is ASCII?
established to encode symbols found in the English alphabet
What is the ASCII character set ?
a 7 bit character set giving 27 (128) possible binary codes
What is Unicode?
standardise the encoding of characters from all languages
What is the character set of unicode?
either 16 bits or 32 bits
What is the advantage of unicode?
every character in every language in the world, every mathematical and scientific symbol, can be represented
What is the disadvantage of unicode?
It can causes for an excessive amount of unused storage for each character
How was the introduction of unicode improved
•first 128 Unicode characters were set to be the same as the ASCII character set
