card. It is made of high-strength, high temperature resistant plastic or paper coated plastic with features of moisture, abrasion, and a certain degree of flexibility, easy carry, stable and reliable use. Generally, one side of the card is printed with instruction information as tips, such as card inserting direction; the other side has magnetosphere or magnetic stripe with a 2-3 tracks to record information.
Magnetic strip consist of a thin layer of iron oxide particles orientedly arranged (also called pigment), bonded together closely on non-magnetic media of paper or plastic substrates by resin adhesive. Essentially magnetic stripe is the same as
computer tape or disk. It can be used to record letters, characters and digital information. It is firmly bonded together with plastic or paper by adhesive or heat seal to form a magnetic card. The information contained in the magnetic strip is typically larger than the big bar. Magnetic strip can be divided into three separate tracks, known as TK1, TK2, TK3.Mostly 79 letters or characters can be written up to TK1; 40 characters can be written up to TK2; 107 characters can be written up to TK3.
Computer processing technology
Bar code / magnetic card reader is acquisition equipment of bar code / magnetic card application system, which can quickly and accurately capture the data denoted by bar code / magnetic card and send them to computer for processing.
Computer is used to store and process data in a bar code / magnetic card application system. Owing to big computer storage capacity and fast speed, many complicated data processing becomes easy, rapid, and timely. Computer applied to management can significantly reduce labor intensity of workers, improve working efficiency, and complete some work that could not be done by hand. The key in bar code / magnetic card system is data processing technology. Totally speaking, a computer database management system may be related to bar code / magnetic card devices.
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