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I.2.1 Introduction

The Open Architecture Community System (OpenACS) is a Web development
framework for building applications that support online communities.
OpenACS provides a robust infrastructure, building on top of the following standard
components: the Tcl programming language, a Postgres or Oracle database for storing the
application data, AOLserver for HTTP service and *nix or Windows operating systems.
Like other modern Web frameworks, OpenACS supports: templating for separating the
logic from the presentation, internationalization to present the user interface in the user’s
preferred language, a modular package system to create sub-applications, a role and
permissioning system, a content repository to store all manner of content and maintain