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spec: Digital libraries are one example of such services ; numerous other examples of such services may be found in emerging electronic commerce applications . The situation could be significantly improved by the establishment of requirement to regularly publish the information on the management of environmental funds . And all this will demand more creativity , more hard work , more accountability and , above all , more imagination . Course emphasis includes fleet communications and communication security , naval tactics , relative motion , maneuvering board , and ship operations and control . ( check only one ) . However such electronic enhancement has had a valuable role as an adjunct to physical events , and since 1995 , many international scientific conferences have had offered a Web component.26 This can range from making available before the start an electronic book of abstracts , an electronic registration desk at which participants could supply their personal details , and obtain travel and tourist information . In addition to the link resources , a burst switch must also manage the allocation of burst storage resources . Electronic technicians perform maintenance on all electronic equipment in our communications network to include : HF transmitters and receivers , digital terminal devices , cryptographic equipment , satellite terminals , and computer systems . There are no TV Guides to sort through the 5,000 discussion groups or the 2,500 electronic newsletters or the tens of thousands of computers with files to share . Services include both electronic imaging and microfilming .