Abstract: it is considered that the fundamental way out for software development lies inthe object/problem--oriented visual modelization of analysis, design, and realization.The LOODS system is an abstract model and supporting tool based on these ideas. It is an object-oriented modeling methodology for concurrent/parallel information systems and other network computing on the basis of requirements’ analysis results. Its supporting tools and working ways are visual and support learning by examples. Currently,LOODS has been realized in C + + on Novell netware environment.