A 1993 study compared trends in the structure of qualifications for occupations related to the installation, management, and maintenance of computer networks in Germany, France, Italy, the Netherlands, Portugal, and the United Kingdom. Staff involved in networks required specialized new skills related to feasibility and design, installation, management, help for users and assistance, and monitoring and maintenance. Initial training was essential only when staff had not participated in setting up and installing the network. Specific, supplementary, continuing training almost always followed. The very diversified and changing nature of techniques related to computer networks made informal experience particularly important. Differences in the recognition of qualifications probably related to such factors as the certification and the degree of sophistication of the certification system. The tasks identified in the six countries were generally the same although the scope of such activities varied. In all countries, there was a more or less formal recognition of the tasks of network manager and network maintenance. Three conclusions were reached: the computer network sector was one of the most dynamic in the European economy; interfaces and high quality specialists were needed; and there was a gap between company needs and skills taught by training organizations. (YLB)