What's a magnetic stripe card? I'd like to thank all of you for your help.

Used for supermarket membership cards are basically barcode card or magnetic stripe card two kinds of general supermarkets on the use of barcode cards, can be the same as the goods, with a barcode scanner read out, magnetic card, then you need to buy another device, naturally, more costs, it is recommended to use the barcode card to operate better! The following is an introduction to the magnetic card you want, magnetic card introduction 1, Deepas card magnetic card classification Magnetic stripe type: general anti-magnetic card (300oe) directly coated print type: low anti-magnetic card (300oe) (such as: park tickets) high anti-magnetic card (2700oe) (such as: subway cards, telephone cards) 2. magnetic stripe and magnetic channel magnetic stripes on the magnetic stripe there are three magnetic channels. Magnetic channel 1 and 2 is a read-only magnetic channel, the use of the information recorded on the magnetic channel can only be read and not allowed to write or modify. Track 3 is a read-write track that can be read and written to when in use. Track 1 can record numbers (0-9), letters (A-Z), and other symbols (such as brackets, separators, etc.) up to a maximum of 79 numbers or letters. Tracks 2 and 3 can record only numbers (0-9). The maximum number of characters that can be recorded on track 2 is 40, and the maximum number of characters that can be recorded on track 3 is 107. 3. Magnetic card reader General non-financial areas with magnetic cards, only the information recorded in the 2nd track, a single 2-rail read-only reader priced at 400 yuan / unit, a single 2-rail read-write read-write can be read at a price of 1800 yuan / unit. Financial sector with magnetic cards, magnetic channel 1, 2, 3 may be used, such as ICBC with 1, high resistance magnetic card (3500oe) 3 magnetic channel, CCB with 2, 3 magnetic channel. 1, 2, 3 magnetic channel can be read and write the reader is priced at 4,800 yuan / unit. The above can be seen, the magnetic card reader is very cheap, but the reader is more expensive, due to the general application, the magnetic card only record personal account numbers and other read-only information, use and not to write information to the card. 4. Security and Problems of Magnetic Cards A. Poor Confidentiality and Security of Cards The information on the magnetic stripe is easier to read out, and it is also easier to illegally modify the contents of the magnetic stripe, so most of the time the magnetic card is used as a static data input. Although track 3 can be read and written and has an amount field, it is only used for small amounts of money in applications such as telephone cards. B. The application system using magnetic cards needs to be supported by a reliable computer system and a centralized database In the financial industry, magnetic cards as financial transaction cards are generally used in conjunction with a strong and reliable computer network system, where the amount, transaction records and other information are stored in the database of the financial institution's computer, and the card held by the user only provides the user's main account number and other index information, which makes it easy to find the user data quickly in the database. User data. International Standard for Magnetic Cards 1. ISO 7810:1985 Identification Cards Physical Characteristics Specifies the physical characteristics of the card, including card materials, construction, and dimensions. The dimensions of the card are as follows: Width 85.72mm----85.47mm Height 54.03mm----53.92mm Thickness 0.76±0.08mm Radius of the corners of the card 3.18mm Generally speaking, the dimensions of the card are as follows: 85.5 X 54 X 0.76. 2. ISO 7811-1:1985 Identification Card Recording Technology Part 1: Letterpress Printing Part 1: Letterpress specifies the requirements for the characters to be letterpress printed on the card (character set, font, character spacing and character height). ISO 7811-2:1985 Identification card recording technology Part 2: Magnetic stripe Specifies the characteristics of the magnetic stripe on the card, the encoding technology and the encoded character set. 4. ISO 7811-3: 1985 Identification card recording techniques, Part 3: Position of embossed characters on ID-1 type cards 5. ISO 7811-4: 1985 Identification card recording techniques, Part 4: Position of magnetic tracks 1 and 2 on read-only magnetic tracks 6. ISO 7811-5: 1985 Identification card recording techniques, Part 4: Position of magnetic tracks 1 and 2 on read-only magnetic tracks 6. ISO 7811-5: 1985 Identification card recording techniques, Part 5: Position of magnetic tracks 1 and 2 on read-only magnetic tracks ISO 7811-5: 1985 Identification card Recording technology Part 5: Read and write the magnetic channel of the 3rd magnetic channel position Shanghai Lihui smart card production center - professional magnetic stripe card barcode card card company Shanghai Lihui smart card company, specializing in ISO international (non-) standard size IC card production, contact IC card, non-contact IC card, smart IC card, inductive ID card, mf1 radio frequency card, ID access control card, Induction IC card, stored value IC card and its application system solutions. >> IC card international standard size ISO9002 standard ISO7816 defines the ic card chip midpoint to the left edge of the card distance: 15.06mm, to the upper edge of the distance: 23.89mm (8-pin), 22.62mm (6-pin), width: 85.72-85.74mm, height: 54.03-53.92 Thickness: 0.83mm. Supplementary: Dipas card barcode is a set of bar, empty symbols arranged in accordance with certain coding rules, to represent certain characters, numbers and symbols composed of information. Barcode system is an automatic identification system composed of barcode symbol design, production and scanning and reading. There are many kinds of barcode, there are about twenty kinds of common code system, including: Code39 code (standard 39 code), Codabar code (Codabar code), Code25 code (standard 25 code), ITF25 code (cross 25 code), Matrix25 code (matrix 25 code), UPC-A code, UPC-E code, EAN-13 code (EAN-13 international commodity bar code), EAN-13 code (international commodity bar code), EAN-13 code (international commodity bar code), EAN-13 code (international commodity bar code), EAN13 code (international commodity bar code), EAN-13 code (international commodity bar code), EAN-13 code (international commodity bar code). International Merchandise Code), EAN-8 code (EAN-8 International Merchandise Code), China Postal Code (a variant of Matrix25), Code-B code, MSI code, Code11 code, Code93 code, ISBN code, ISSN code, Code128 code (Code128 code, including EAN128), Code39EMS (EMS), and other 1D codes. Specialized 39 code) and other one-dimensional bar codes and PDF417 and other two-dimensional bar codes. At present, the international widely used bar code types are EAN, UPC code (commodity bar code, used to uniquely identify a commodity in the world. We are most common in the supermarket is this kind of bar code), Code39 code (can represent numbers and letters, in the field of management of the most widely used), ITF25 code (in the logistics management in the application of more), Codebar code (mostly used in the field of health care, books), Code93 code, Code128 code and so on. Among them, EAN code is widely used in the world of commodity bar code, has become the basis of electronic data interchange (EDI); UPC code is mainly used in the United States and Canada; in all kinds of bar code application system, Code39 code can be used because of its numbers and letters *** with the composition of the same way in the internal management of the various industries are widely used; in the blood bank, libraries and photo studio business, Codebar code is also widely used. Codebar codes are also widely used in blood banks, libraries and photo labs. In addition to the one-dimensional bar codes listed above, two-dimensional bar codes have also been developing rapidly and have found applications in many fields. EAN Code: EAN code is a commodity barcode developed by the International Article Numbering Association and is commonly used all over the world. there are two kinds of EAN code symbols, namely, standard version (EAN-13) and shortened version (EAN-8), which are equivalent to the general commodity barcode in China. The barcode printed on the package of the goods we buy every day is generally EAN code. UPC code: UPC code is the United States Uniform Code Council developed a commodity bar code, mainly used in the United States and Canada, we can see in the United States imported goods. 39 code: 39 code is a kind of bar code that can represent numbers, letters and other information, mainly used in industry, books and tickets for automated management, and is now widely used. Kudba (Codebar) code: Kudba code can also represent digital and alphabetic information, mainly used in health care, library information, materials and other areas of automatic identification. Two-dimensional bar code: one-dimensional bar code carries a limited amount of information, such as commodities on the bar code can only accommodate 13 (EAN-13 code) Arabic numerals, more information can only rely on the support of commodity databases, away from the pre-established database, the bar code will not make sense, so to a certain extent, also limits the scope of application of the bar code. For this reason, two-dimensional barcodes were invented in the 1990s. In addition to the advantages of one-dimensional barcodes, two-dimensional barcodes also have the advantages of high information content, high reliability, confidentiality and anti-counterfeiting. At present, two-dimensional barcodes are mainly PDF417 code, Code49 code, Code 16K code, Data Matrix code, MaxiCode code, etc., which are mainly divided into two categories: stacked or laminar rows and checkerboards or matrices.