physical representation---bit(name is a portmanteau of binary digit! ? )

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A bit can be stored by a digital device or other physical system that exists in either of two possible distinct states. These may be the two stable states of a flip-flopフリップフ ロップ,, 突然の^変更[転換]、宙返り、とんぼ返り, two positions of an electrical switch, two distinct voltage or current levels allowed by a circuit, two distinct levels of light intensity, two directions of magnetization or polarization, the orientation of reversible double stranded DNA, etc.
Perhaps the earliest example of a binary storage device was the punched card invented by Basile Bouchon and Jean-Baptiste Falcon (1732), developed by Joseph Marie Jacquard (1804), and later adopted by Semyon Korsakov, Charles Babbage, Herman Hollerith, and early computer manufacturers like IBM. A variant of that idea was the perforated paper tape. In all those systems, the medium (card or tape ) conceptually carried an array of hole positions; each position could be either punched through or not, thus carrying one bit of information. The encoding of text by bits was also used in Morse code (1844) and early digital communications machines such as teletypes and stock ticker machines (1870).
The first electrical devices for discrete logic (such as elevator and traffic light control circuits, telephone switches, and Konrad Zuse's computer ) represented bits as the states of electrical relays which could be either "open " or "closed ". These relays functioned as mechanical switches, physically toggling between states to represent binary data, forming the fundamental building blocks of early computing and control systems. When relays were replaced by vacuum tubes, starting in the 1940s, computer builders experimented with a variety of storage methods, such as pressure pulses traveling down a mercury delay line, charges stored on the inside surface of a cathode-ray tube, or opaque spots printed on glass discs by photolithographic techniques. カメラは、さいしょは・・電 気を使わないものだったが・人々の間に広まり流行となった・ ・ それが、電気をタメル?!テク ニックみたいなものに・ ・・また、人体のメカニズムも!・?・、・, ,
In the 1950s and 1960s, these methods were largely supplanted by magnetic storage devices such as magnetic-core memory, magnetic tapes, drums, and disks, where a bit was represented by the polarity of magnetization of a certain area of a ferromagnetic film, or by a change in polarity from one direction to the other. The same principle was later used in the magnetic bubble memory developed in the 1980s, and is still found in various magnetic strip items such as metro tickets and some credit cards.
In modern semiconductor memory, such as dynamic random-access memory or a solid-state drive, the two values of a bit are represented by two levels of electric charge stored in a capacitor or a floating-gate MOSFET. In certain types of programmable logic arrays and read-only memory, a bit may be represented by the presence or absence of a conducting path at a certain point of a circuit. In optical discs, a bit is encoded as the presence or absence of a microscopic pit on a reflective surface. In one-dimensional bar codes and two-dimensional QR codes, bits are encoded as lines or squares which may be either black or white.  electricityデンキはriddle不思議?・? ・それを、thumb through(~をパラパラめくる、~にサッと目を通す、急いで目を通す ) 紐解ヒモトいているlook like?様ヨウな?・??・ ・
In modern digital computing, bits are transformed in Boolean logic gates.
< https://en.wikipedia.org/wiki/Bit >
{all of them are usingみんな電気を使っているのthus, therefore, consideringだから・such the naming stuffsそんなネーミングのものは・・I assume thatit is win当るのあたり前!! ?, , }

c.f, ,
storage(physical representation )---bit< https://en.wikipedia.org/wiki/Bit >
*KiB[kibibyte ]キビバイト(1 KiB = 1024 bytes = 8192 bits ) < https://ja.wikipedia.org/wiki/%E3%82%AD%E3%83%93%E3%83%90%E3%82%A4%E3%83%88 >/wiki/キビバイト(あまりにもお金に基準が集まりすぎて! ?,,どうでもよくなってル傾向カナ♪? ?,, )

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