The system adopts the method of vacuum channel, Circulate a loop of tape between two points. Data in inches 100 The speed of bits completes the recording. Seven track magnetic tape has six tracks for data storage, One track for parity. This seven track tape moves every second 75 Inch, The transmission rate is 12500 Bits per second or 7500 Characters per second, It was called a copy group. This new home is very comfortable, Tape can store up to 200 10000 bit space. Data bytes can now be read from Uniservo Transfer the metal tape to IBM On the tape. Here we are 1952 year 5 month 21 Japan, at that time IBM Released its first tape drive -IBM 726. ![]() Now, We can measure the speed of the storage algorithm by the distance traveled by the tape. Per second 100 Inch speed moving on tape. Byte data can be in bytes per second 7,200 The speed of characters is stored in. ![]() This tape weighs three pounds, Half an inch wide, By is called vicalloy Made of nickel plated phosphor bronze, Long 1200 feet. ħ0 Years ago, about 1951 In Univac 1 On the computer was born Uniservo Tape drives, This is the tape drive of the first commercial computer. Through time, Let this data byte run through various storage technologies. Suppose we have a byte of data to store : Letter j, Or encoded bytes 6a, Or binary 01101010. The number of bits in a byte varies with the design of the storage medium in the past, Time travel through various storage media, You can understand how data is stored in history. stay ASCII in, Each character is a byte, But in Unicode in, A character can be a 、 Two 、 Three or more bytes. UTF-16 Is to represent the character as 16 Bit standard ,UTF-32 yes 32 Bit standard. This is no problem for English characters, But characters in other languages are usually represented as two or more bytes. UTF-8 Is to represent the character as 8 Bit standard, allow 0 To 127 Each code point between is stored in a byte. for example, Lowercase j Expressed as u + 006 a, among u Express Unicode, Followed by a hexadecimal number. To support other languages ,Unicode Expanded ASCII, To represent each character as an encoded value. ) Expressed as a value between 32 and 127 Between 7 An integer. ASCII It's based on English letters, therefore, Every letter 、 Numbers and symbols (A-Z、 A-Z、0-9、 + 、-、/! etc. ġ956 year 6 month ,Werner Buchholz Created byte This word refers to a set of bits used to encode a single text character, Later it evolved into what we know ASCII code. ![]() stay DRAM in, A bit is usually represented as a two-stage charge stored in a capacitor, A capacitor is a device that stores electrical energy in an electric field. For magnetic storage devices such as tape and disk, Bits represent the polarity of a region of the disk. In the age of paper cards, Whether there is a hole in a specific position in the card to represent a bit. ![]() Go back to Babbage Analytical machine, You can see that a bit is stored as the position of a mechanical gear or lever. Let's follow the pace of time and take a simple walk, Let's first understand the origin of bits and bytes. A byte is a unit of digital information, Usually eight, A bit is a unit of information, It can be expressed as 0 or 1, Indicates the logical state. With the update 、 Better 、 The advent of faster storage media, A byte of data can be stored in many different ways.
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