Definition
OpenWindows is a graphical user interface (GUI) and desktop environment developed by Sun Microsystems for its UNIX-based operating systems, most notably SunOS and early versions of Solaris. It provided a windowing system, integrated tools, and applications for users to interact with the operating system via graphical elements such as windows, menus, and icons.
Overview
First released in 1989, OpenWindows combined the X Window System (X11) with Sun's own display manager, window manager, and a set of productivity applications. It served as the default desktop environment for SunOS 4.1.1 and later for Solaris 2.x (Solaris 2.0 through Solaris 7). The environment was positioned as an alternative to other UNIX GUIs such as IBM's Common Desktop Environment (CDE) and the Motif-based environments popular at the time. OpenWindows was eventually superseded by the CDE and later by GNOME and KDE on Solaris platforms.
Etymology/Origin
The name “OpenWindows” reflects Sun Microsystems’ marketing emphasis on openness and standards. “Open” signified compliance with open standards (primarily the X Window System), while “Windows” denoted the graphical windowing metaphor. The term does not derive from any prior trademarked product, but was coined internally by Sun to differentiate the offering from its earlier SunView (a proprietary windowing system).
Characteristics
| Feature | Description |
|---|---|
| Core Technologies | Built on X11R4 (later updates) with the X11 protocol for network-transparent display. |
| Window Manager | Utilized the olvwm (Open Look Virtual Window Manager) and later dtwm for managing windows, supporting both the Open Look and later Open Look 2.0 visual styles. |
| Look and Feel | Implemented the Open Look GUI guidelines, featuring rounded rectangular widgets, two-dimensional icons, and a focus on clarity and accessibility. |
| Toolkits | Provided the XView and OLIT (Open Look Intrinsics Toolkit) libraries for application development, enabling programmers to create Open Look‑compliant applications. |
| Applications | Included a suite of utilities such as xterm, xedit, xcalc, xmail, and desktop file manager, as well as Sun-specific tools like Solaris Installer and Network Manager. |
| Internationalization | Supported multiple character sets and locales, employing the X11 Locale and UTF‑8 extensions in later revisions. |
| Network Transparency | Like X11, allowed applications to run on remote servers while displaying on a local workstation, facilitating thin‑client usage. |
| Integration with Solaris | Tight integration with Solaris system services, including Solaris Media Manager, Printer Manager, and security mechanisms (e.g., Solaris Trusted Extensions). |
| Legacy Support | Retained compatibility with legacy SunView applications through the XSun compatibility layer in early releases. |
Related Topics
- X Window System (X11) – The underlying protocol and architecture for networked GUIs on UNIX and Linux systems.
- Open Look – The design language and widget specification defined by Sun Microsystems and AT&T for OpenWindows.
- CDE (Common Desktop Environment) – The successor to OpenWindows as the standard desktop for many commercial UNIX variants, including later Solaris releases.
- Motif – Another prominent GUI toolkit and look that competed with Open Look during the 1990s.
- GNOME and KDE – Modern desktop environments that eventually became the default on Solaris after the decline of proprietary solutions.
- SunView – The predecessor proprietary windowing system that preceded OpenWindows.
OpenWindows played a pivotal role in the evolution of UNIX graphical interfaces in the late 20th century, influencing design standards and contributing to the broader adoption of X11‑based environments across various UNIX platforms.