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  3. In managing information resources, the medium may be the key to an effective system. The medium is a vehicle, a tool, or a conta

In managing information resources, the medium may be the key to an effective system. The medium is a vehicle, a tool, or a conta

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问题     In managing information resources, the medium may be the key to an effective system. The medium is a vehicle, a tool, or a container for holding information; the information itself is the thing of value.
    Three popular categories of information media are paper, film, and electronic storage devices. The media choice must not be viewed as a choice among these three, however, it must be viewed as an opportunity to select from a multitude of media possibilities in combinations that build effective systems. In many instances the person responsible for information — resource management is not the person who determines the medium in which information will be created. In such a case, the manager of a firm’s information resources faces a challenge in making a significant contribution to the organization’s objectives.
    For effective management of information resources, media conversion may be necessary. Examples include keying or scanning paper documents to convert them to electronic media. Other processes convert electronic media from one format to another. For example, disk files created on one system may not be compatible with another system. Various hardware and software combinations can be used to convert files to formats that equipment will accept. For information generated within organizations, this necessity of making systems compatible may be eliminated by cooperative planning. However, very little control can be exercised over the media used to generate information that comes to your organization from the outside.
    The medium for information may be selected to satisfy a need that exists when information is created and communicated. For example, a paper record may be created because of its portability and because no special equipment is necessary for later references to that information; electronic transmission may be selected because it is the fastest means of communicating information. A firm may use electronic mail because a network already exists for on-line computer communication. The additional application may cost less than postage to mail paper memos.
The main idea of the last paragraph is______.
选项 A、paper record is the most convenient medium for later reference
B、electronic mail costs less than postage to mail paper memos
C、different media for information may be selected for different purposes
D、by using different media, a firm can create various information for its objectives
答案C
解析 主旨题。根据最后一段第一句“The medium for information may be selected to satisfy a need”可知，选择信息媒介的目的是满足不同的需要。所以正确答案是C选项。
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