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A rare-earth magnet is a strong permanent magnet made from alloys of rare-earth elements. Developed in the 1970s and 1980s, rare-earth magnets are the strongest type of permanent magnets made, producing significantly stronger magnetic fields than other types such as ferrite or alnico magnets. The magnetic field typically produced by rare-earth ...
Digital coupons (also known as e-coupons, e-clips or clipped deals) are the digital analogue of paper coupons which are used to provide customers with discounts or gifts in order to attract the purchase of some products. Mostly, grocery and drug stores offer e-coupon services in loyalty program events. Even though there are still traditional ...