Novell's Net ware¹ has become the strongest competitor to IBM's own network operating environment and predates IBM in its support for LANs. In fact,IBM now markets Net ware for both the PC Network and for Token Ring in addition to its own software.The key to Net ware is the file server software and directories on the server are mapped to network drives, thus operating like virtual diskettes from a user's perspective. The server software is a multitasking operating system with a file structure consistent with DOS 2.x and DOS 3.x. The Net ware shell in each workstation intercepts² 21H DOS calls and redirects appropriate calls to the server.

Perhaps the primary advantage of Net ware is that it runs on a wide variety of networking hardware.Regardless of whether you choose an IBM network, Corvus OMNINET, AT＆T Star LAN, etc., you can obtain Net ware as the operating environment. In fact, if you have one of each the user will not be able to tell the difference(unless there are some distinct performance differentials), and they can be interconnected through Novell's system of bridges and gateways³.　　

Novell公司的Net ware操作系统已经成为IBM公司特有的网络操作环境最强有力的竞争对手，它在对局域网络的支持方面也早于IBM公司。事实上，除了自己的一部分软件外，IBM公司也为所有的PC网和令牌环网购买了Net ware操作系统。Net ware 操作系统的最主要部分是文件服务器软件，服务器上的目录被映射到网络驱动器，这样在用户看来，它运行起来就如同是虚拟磁盘。它的服务器软件是一个多任务的操作系统，文件结构也与

DOS 2.x和DOS 3.x的文件结构一致。工作站上的 Net ware外壳程序拦截了DOS的21H中断，并重新走向为对服务器的调用。

Net ware操作系统的主要优点是能够运行在多种网络硬件上。不论是选择IBM网络，Corvus公司的OMNINET网络，还是AT＆T公司的星形局域网络等，都可获得Net ware的操作环境。