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One of fundamental, non functional requirements involving modern computer systems is their short production time. The market situation changes very quickly and reactions of companies must be very dynamic, too. Many existing systems must be moved into the Internet to achieve flexible access from different departments of the company and from each place over the world (where the internet connection is active, of course). The short production time is the reason for that new internet applications aren’t developed from scratch today. Many different frameworks are used for development. They frequently include application structures, design patterns or ready to use specific libraries, but it still requires the time for learning the frameworks. What should we do if we want to build a new internet application? The answer is “portal”.Portals are flexible applications which provide the environment for portlets. They may be tailored to different customer needs thanks to the ability of using many different kinds of portlets. The comfortable use of portlets, a huge number of such components in the web, which are also distributed as open-source software, as well as the ability to create new portlets give a lot of possibilities for the internet application developers. They also allows us to provide the most complex solutions in the shortest time possible, which is required by the market.
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