„Byte“ – Versionsunterschied

* eine [[Maßeinheit]] für eine [[Datenmenge]] von 8&nbsp;Bit mit dem [[Einheitenzeichen]]&nbsp;„B“,<ref>IEC&nbsp;60027-2, Ed. 3.0, (2005–2008): Letter symbols to be used in electrical technology – Part 2: Telecommunications and electronics.</ref> wobei es nicht auf die Ordnung der einzelnen Bits ankommt.<br />Das EinheitszeichenEinheitenzeichen sollte nicht mit dem zur Einheit&nbsp;[[Bel (Einheit)|Bel]] gehörenden EinheitszeichenEinheitenzeichen&nbsp;„B“ verwechselt werden.

* eine geordnete Zusammenstellung ([[Tupel#Verwendung|n-Tupel]]) von 8&nbsp;Bit, deren formale [[Internationale Organisation für Normung|ISO]]-konforme Bezeichnung [[Oktett (Informatik)|Oktett]] ist (1&nbsp;Byte = 8&nbsp;Bit). <!-- Bitte Diskussionsseite beachten -->Ein Oktett wird manchmal in zwei Hälften ([[Nibble]]s) zu je 4&nbsp;Bit zerlegt, wobei jedes Nibble durch eine [[Hexadezimalsystem|hexadezimale Ziffer]] darstellbar ist. Ein ujjz8h7tgesOktettOktett kann also durch zwei Hexadezimalziffern dargestellt werden.

** bei [[IBM Personal Computer|IBM PC]] bzw. der [[IBM-PC-kompatibler Computer|kompatiblen Plattform]]: 1 Zeichen = 8&nbsp;Bit = 1&nbsp;Oktett

== {{Anker|Präfixe|Einheiten für große Mengen Bytes}} Bedeutungen von |Dezimal- und BinärpräfixenBinärpräfixe für große Anzahlen von Byte}} Präfixe für große Anzahlen von BytesByte ==

Apples [[macOS]] benutzt abseit 2009 (Version [[Mac OS X Snow Leopard]] (10.6)<ref name="Mac" /> einheitlich Dezimalpräfixe nur in dezimaler Bedeutung. [[KDE Software Compilation 4|KDE]] folgt dem IEC-Standard und lässt dem Anwender die Wahl zwischen binärer und dezimaler Angabe. Für Linux-Distributionen mit anderen Desktopumgebungen, wie zum Beispiel [[Ubuntu (Betriebssystem)|Ubuntu]] ab Version 11.04,<ref name="Ubuntu" /> (August 2011) gibt es klare Richtlinien, wie Anwendungen Datenmengen angeben sollen; hier findet man beide Angaben, wobei die Binärpräfixe überwiegen.

<references responsive >

{{cite journal |last=Bemer |first=Robert William |authorlink=Bob Bemer |year=1959 |title=A proposal for a generalized card code of 256 characters |journal=Communications of the ACM |volume=2 |issue=9 |pages=19–23 |doi=10.1145/368424.368435 |language=en}}

{{cite journal |author=Gerrit Anne Blaauw, Frederick Phillips Brooks Jr., Werner Buchholz |title=Processing Data in Bits and Pieces |journal=IRE Transactions on Electronic Computers |pages=121 |date=1959-06 |language=en}}

{{cite journal |last=Buchholz |first=Werner |authorlink=Werner Buchholz (Ingenieur) |title=The Word „Byte“ Comes of Age... |journal=Byte Magazine |volume=2 |issue=2 |pages=144 |date=1977-02 |url=https://archive.org/stream/byte-magazine-1977-02/1977_02_BYTE_02-02_Usable_Systems#pages/n145/mode/2up |quote=[…] The first reference found in the files was contained in an internal memo written in June 1956 during the early days of developing Stretch. A byte was described as consisting of any number of parallel bits from one to six. Thus a byte was assumed to have a length appropriate for the occasion. Its first use was in the context of the input-output equipment of the 1950s, which handled six bits at a time. The possibility of going to 8 bit bytes was considered in August 1956 and incorporated in the design of Stretch shortly thereafter. The first published reference to the term occurred in 1959 in a paper „Processing Data in Bits and Pieces“ by [[Gerrit Blaauw|G&nbsp;A&nbsp;Blaauw]], [[Frederick P. Brooks|F&nbsp;P&nbsp;Brooks&nbsp;Jr]] and [[Werner Buchholz (Ingenieur)|W&nbsp;Buchholz]] in the ''IRE Transactions on Electronic Computers'', June 1959, pages 121. The notions of that paper were elaborated in Chapter 4 of ''Planning a Computer System (Project Stretch)'', edited by W&nbsp;Buchholz, McGraw-Hill Book Company (1962). The rationale for coining the term was explained there on pages 40 as follows:<br />Byte ''denotes a group of bits used to encode a character, or the number of bits transmitted in parallel to and from input-output units. A term other than ''character'' is used here because a given character may be represented in different applications by more than one code, and different codes may use different numbers of bits (ie, different byte sizes). In input-output transmission the grouping of bits may be completely arbitrary and have no relation to actual characters. (The term is coined from ''bite'', but respelled to avoid accidental mutation to ''bit''.)''<br />System/360 took over many of the Stretch concepts, including the basic byte and word sizes, which are powers of 2. For economy, however, the byte size was fixed at the 8 bit maximum, and addressing at the bit level was replaced by byte addressing. […] Since then the term byte has generally meant 8 bits, and it has thus passed into the general vocabulary. […] |language=en}}

<ref name="Philips">{{Internetquelle |url=http://www.intactvintage-reuniescalculators.nl/pdf/product1971Philips%20productoverzicht%201971.pdf |titel=Philips Data Systems’ product range – April 1971 |hrsg=Philips |datum=1971 |format=PDF; 4,8 MB |sprache=en |offline=ja |archiv-url=https://web.archive.org/web/20160304072023/http://www.intact-reunies.nl/pdf/product1971.pdf |archiv-datum=2016-03-04 |archiv-bot=2019-08-28 17:00:07 InternetArchiveBot |abruf=20152023-0809-03 |format=PDF10}}</ref>