ADVERTISING |
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Firms in the advertising and public relations services industry prepare advertisements for other companies and organizations and design campaigns to promote the interests and image of their clients. This industry also includes media representativesÂfirms that sell advertising space for publications, radio, television, and the Internet; display advertisersÂbusinesses engaged in creating and designing public display ads for use in shopping malls, on billboards, or in similar media; and direct mail advertisers. A firm that purchases advertising time (or space) from media outlets, thereafter reselling it to advertising agencies or individual companies directly, is considered a media buying agency. Divisions of companies that produce and place their own advertising are not considered part of this industry.
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AUCTIONS AND E-COMMERCE |
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An auction is the process of buying and selling things by offering them up for bid, taking bids, and then selling the item to the highest bidder. Auctioning can be traced as far back as 500 B.C.[1] In economic theory, an auction is a method for determining the value of a commodity that has an undetermined or variable price. Auctions can be with reserve or minimum, or without minimums, or absolute or no reserve. In reserve auctions, there is a minimum bid or reserve price; if the bidding does not reach the minimum, there is no sale (but the person who puts the item up for auction may still owe a fee to the auctioneer or auction company). In absolute or no reserve auctions, the sale is guaranteed, with only the price left to be determined. In the context of auctions, a bid is an offered price.
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DIGITAL TELEVISION |
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DTV can be used to carry more channels in the same amount of bandwidth than analog TV (6 MHz or 7 MHz in Europe) and to receive high-definition programming. The digital signal eliminates common analog broadcasting artifacts such as "ghosting", "snow", and static noises in audio. However, when the signal is transmitted at a too low data rate DTV replaces these artifacts with new MPEG compression artifacts, such as "blocking", and may fail to work entirely in situations where analog television would have produced an impaired but watchable picture. Depending on the sophistication and level of the error correction defined by the technical standard that the broadcaster complies with, DTV may either work perfectly or not work at all.
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ERGONOMICS |
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Ergonomics (or human factors) is the scientific discipline concerned with the understanding of interactions among humans and other elements of a system, and the profession that applies theory, principles, data, and methods to design in order to optimize human well-being and overall system performance (definition adopted by the International Ergonomics Association in 2000).
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INTERNET |
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The Internet, or simply the Net, is the publicly accessible worldwide system of interconnected computer networks that transmit data by packet switching using a standardized Internet Protocol (IP). It is made up of thousands of smaller commercial, academic, domestic, and government networks. It carries various information and services, such as electronic mail, online chat, and the interlinked Web pages and other documents of the World Wide Web.
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TECHNOLOGY |
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Technology is a word with origins in the Greek "technologia" ("τεχνολογία") "techne", "τέχνη" ("craft") and "logia", "λογία" ("saying")." "Technology" is a broad term dealing with the use and knowledge of humanity's tools and crafts.
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