Common Open Software Environment

Common Open Software Environment. The Common Open Software Environment was a significant industry initiative launched in the early 1990s to create a unified, open standard for Unix-based desktop environments. Spearheaded by a consortium of major technology vendors, it aimed to end the costly "Unix wars" by establishing common APIs, look-and-feel, and networking protocols. Although largely superseded by later projects, its work directly influenced the development of ubiquitous modern open-source desktop platforms.

Overview

The initiative was formed as a direct response to the fragmented and competing landscape of proprietary Unix systems from vendors like Sun Microsystems, IBM, and Hewlett-Packard. Its primary goal was to define a comprehensive common desktop environment to ensure application portability and a consistent user experience across different operating systems. This effort sought to make Unix more competitive against the rising dominance of Microsoft Windows and the Apple Macintosh in the business and technical workstation markets. The consortium published the COSE specification, which encompassed elements from existing environments like OSF/Motif and OpenWindows.

History and development

COSE was announced in March 1993 by a powerful coalition known as the "Common Open Software Environment" group, which included Hewlett-Packard, IBM, SunSoft (a subsidiary of Sun Microsystems), Unix System Laboratories, and Univel. This alliance represented a strategic ceasefire among rivals who had previously backed competing standards like OSF/1 and UNIX System V. The group worked rapidly, demonstrating a preliminary "Desktop Management Interface" at the UNIX Expo later that year. Their work was soon merged with the ongoing efforts of the Open Software Foundation and X/Open consortium, leading to the creation of the Common Desktop Environment.

Technical architecture

The technical blueprint was built upon the foundational X Window System for graphical display, mandating the OSF/Motif toolkit and Motif Window Manager for the standard widget set and window management. It specified a common set of desktop services, including a file manager, help system, and drag-and-drop support. Networking interoperability was addressed through adherence to TCP/IP protocols and DCE/RPC standards from the Open Software Foundation. The architecture also defined a consistent API for internationalization and accessibility features.

Key components and standards

Key deliverables included the specification for a unified desktop, which integrated the OSF/Motif look-and-feel as its mandatory graphical user interface. It embraced the X/Open XPG4 brand for portability and the X/Open XTI specification for transport layer interfaces. The initiative also standardized on the Tcl/Tk scripting language for application development and customization. Furthermore, it adopted the NFS protocol for file sharing and promoted the CORBA specification for object-oriented distributed computing frameworks.

Implementations and usage

The primary and most successful implementation of the specifications was the Common Desktop Environment, which became a standard component of commercial Unix systems like HP-UX, IBM AIX, and Solaris. Major vendors shipped CDE as the default desktop throughout the mid-to-late 1990s. Elements of the also influenced the development of KDE and GNOME through shared concepts and liberated toolkits. While the consortium itself did not produce a single monolithic product, its ratified standards were implemented across the member companies' operating system releases and development tools.

Influence and legacy

The initiative's most enduring legacy was providing the technical foundation and industry consensus that led directly to the Common Desktop Environment, which saw widespread deployment for over a decade. It played a crucial role in consolidating the Unix market and reducing fragmentation, allowing vendors to focus on competition with Microsoft. The open specifications later provided a valuable code base for the open-source Xfce desktop and the modern CDE revival project. Furthermore, its model of competitor collaboration set a precedent for future consortiums like The Open Group and the Free Standards Group.