Binary arithmetic | Primitive types | Data unit | Data types | Units of information
The byte is a unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable unit of memory in many computer architectures. To disambiguate arbitrarily sized bytes from the common 8-bit definition, network protocol documents such as The Internet Protocol (RFC 791) refer to an 8-bit byte as an octet. Those bits in an octet are usually counted with numbering from 0 to 7 or 7 to 0 depending on the bit endianness. The first bit is number 0, making the eighth bit number 7. The size of the byte has historically been hardware-dependent and no definitive standards existed that mandated the size. Sizes from 1 to 48 bits have been used. The six-bit character code was an often-used implementation in early encoding systems, and computers using six-bit and nine-bit bytes were common in the 1960s. These systems often had memory words of 12, 18, 24, 30, 36, 48, or 60 bits, corresponding to 2, 3, 4, 5, 6, 8, or 10 six-bit bytes. In this era, bit groupings in the instruction stream were often referred to as syllables or slab, before the term byte became common. The modern de facto standard of eight bits, as documented in ISO/IEC 2382-1:1993, is a convenient power of two permitting the binary-encoded values 0 through 255 for one byte—2 to the power of 8 is 256. The international standard IEC 80000-13 codified this common meaning. Many types of applications use information representable in eight or fewer bits and processor designers commonly optimize for this usage. The popularity of major commercial computing architectures has aided in the ubiquitous acceptance of the 8-bit byte. Modern architectures typically use 32- or 64-bit words, built of four or eight bytes, respectively. The unit symbol for the byte was designated as the upper-case letter B by the International Electrotechnical Commission (IEC) and Institute of Electrical and Electronics Engineers (IEEE). Internationally, the unit octet, symbol o, explicitly defines a sequence of eight bits, eliminating the potential ambiguity of the term "byte". (Wikipedia).
This computer science lesson explains what is meant by byte order, also known as endianness. It covers the difference between storing data in memory, or files, either in big-endian format or little-endian format. The historical advantages of each byte order are discussed, but the video als
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Maths YouTube is doing #MegaFavNumbers — your favourite number greater than one million. The mega-est number I can think of is the number of bytes in a megabyte, but it's probably not the number you're thinking of (and probably not that number either). Maybe you'll learn something about h
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This video introduces big strings and provides the formulas need to determine the total number of n-bit strings and how to determine the number of n-bit strings with a given weight.
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From playlist Learn C programming
In this computer science video you will learn about text files. Specifically, you will see how Unicode code points are encoded into binary and why the byte order, that is the endianness, of some Unicode Transformation Formats could be an important consideration if you’re a programmer hand
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RubyConf 2021 - Optimizing Ruby's Memory Layout by Peter Zhu & Matt Valentine-House
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RubyConfMini 2022: The Three-Encoding Problem by Kevin Menard
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