修订标准-撤销。 撤回标准。撤回日期:1996年4月28日。不再得到IEEE的认可。描述了IEEE标准855-1990，IEEE微处理器操作系统接口标准（MOSI），该标准定义了应用程序与其操作环境之间的接口。它的设计目的是在各种操作系统提供的服务范围内，与微机环境中常用的大多数操作系统兼容。它可以用于在小型和大型环境中访问各种操作系统的服务。

Revision Standard - Inactive-Withdrawn. Withdrawn Standard. Withdrawn Date: Apr 28, 1996. No longer endorsed by the IEEE. Describes the IEEE Std 855-1990, IEEE standard for microprocessor operating system interfaces (MOSI), which defines an interface between application programs and their operating environments. It is designed to be compatible with most operating systems in common use in microcomputer environments, within the scope of services that the various operating systems provide. It can be used to access the services of a variety of operating systems in both small-scale and large-scale environments.