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2. Digital card - Wikipedia

   en.wikipedia.org/wiki/Digital_card

   A stripe of cellophane magnetic tape is fixed to a piece of cardboard with clear adhesive tape. Magnetic storage was known from World War II and computer data storage in the 1950s. [7] In 1969 an IBM engineer had the idea of attaching a piece of magnetic tape, the predominant storage medium at the time, to a plastic card base. He tried it, but ...

3. Magnet - Wikipedia

   en.wikipedia.org/wiki/Magnet

   A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, steel, nickel, cobalt, etc. and attracts or repels other magnets. A permanent magnet is an object made from a material ...

4. Business card - Wikipedia

   en.wikipedia.org/wiki/Business_card

   An attorney's business card, 1895 Eugène Chigot, post impressionist painter, business card 1890s A business card from Richard Nixon's first Congressional campaign, in 1946 Front and back sides of a business card in Vietnam, 2008 A Oscar Friedheim card cutting and scoring machine from 1889, capable of producing up to 100,000 visiting and business cards a day

5. Plastic magnet - Wikipedia

   en.wikipedia.org/wiki/Plastic_magnet

   Plastic magnet. A plastic magnet is a non-metallic magnet made from an organic polymer. Plastic magnets could be used in computer hardware such as disc drives, as well as in medical devices such as pacemakers and cochlear implants, where the organic material is more likely to be biocompatible than its metallic counterparts. [citation needed]

6. Security printing - Wikipedia

   en.wikipedia.org/wiki/Security_printing

   Security printing is the field of the printing industry that deals with the printing of items such as banknotes, cheques, passports, tamper-evident labels, security tapes, product authentication, stock certificates, postage stamps, and identity cards.

7. Barium ferrite - Wikipedia

   en.wikipedia.org/wiki/Barium_ferrite

   Barium ferrite, abbreviated BaFe, BaM, is the chemical compound with the formula BaFe12O19 (BaO: 6 Fe2O3 ). [ 1 ] This and related ferrite materials are components in magnetic stripe cards and loudspeaker magnets. BaFe is described as Ba2+Fe3+12O2−19. The Fe3+ centers are ferrimagnetically coupled, and one unit cell of BaM has a net magnetic ...