理学 系统软件 释 system software 系统软件 计算机系统中提供系统级平台服务功能的软件集合，其处于整个计算机软件层次中的底层，最靠近硬件，负责控制计算机和外部设备，向上层软件提供某一类共性的功能支持，支持应用软件的开发和运行。
system software 系统软件
系统软件 释文 system software 系统软件
- International Hydropower Association
- International Ice Hockey Federation
- international important wetland convention in Rasar in 1971
- International Information Bureau on Astronomical Ephemerides
- International Information Centre for Terminology
- International Institute for Applied Systems Analysis
- International Institute for Conservation of Historic and Artistic Works
- International Institute for Educational Planning
- International Institute for Information Design
- International Institute for Strategy Studies
- International Institute for the Unification of Private Law
- International Institute of Rural Reconstruction
- International Instituteof Social History
- International Institute of Space Law
- International Institute of Tropical Agriculture，IITA
- International Institute of Welding
- international institutions
- International Intellectual Property Alliance
- international intellectual property rights protection of intangible cultural heritage
- International Intermedia Art Festival
- International Internet Preservation Consortium
- international investment agreement
- international investment law
- international investment pattern
- international investment position