Microsoft Windows NT Server 4.0 with NT Option Pack Server Pack (25-Client)

Rating:
Summary: Stable and Reliable Operating System
Review: Why would spend money on soon-to-be obsolete NT 4.0? Go for 2000 server, it will save you money.

Rating:
Summary: Still thinking about NT 4.0?? Go for 2000.
Review: Why would spend money on soon-to-be obsolete NT 4.0? Go for 2000 server, it will save you money.

Rating:
Summary: Stable and Reliable Operating System
Review: Windows NT Server is a highly scalable, reliable and available operating system that meets the requirements of the overwhelming majority of the enterprise and medium size business-computing needs for data management, messaging, transaction processing, Internet services, and file and print infrastructure. Supported by a significant majority of the world's systems providers, Windows NT Server also offers customers (if you're the firm installing the system) with an integrated, multipurpose and cost-effective operating system.

One can argue that Windows 2000 Server would be more cost effective but only if you're starting a system out from scratch. It has been the experience of many pre-existing NT based firms that the real cost effectiveness lies in productivity. Productivity that is based on a stable operating system and clients.