plural of information system

Any data processing system, either manual or computerized. / Any telecommunications system whose primary function is to transmit and/or display data.

Any electronic navigation system which uses space satellites as radio signal sources and position references. / A satellite network used for implementing such a system.

(anatomy) The system of osteons in compact bone

(US, alternative in Canada) A system, policy or understanding based on trust in the honesty, honor, or integrity of others.

Any assemblage of equipment used to generate, store and distribute electrical power on board a satellite or spacecraft

(computing) A computer software system for organizing and facilitating collaborative creation of documents and other content, especially for loading to a website

plural of operating system

(neuroanatomy) One of the divisions of the autonomic nervous system, based between the brain and the spinal cord, that slows the heart and relaxes muscles.

(computing) The tool used by an operating system (OS) to administrate addition, removal and upgrade of software applications. Examples of package management systems on different OSes are: Linux: RPM; Solaris: pkgadd; HP-UX: SD-UX; Debian: apt-get; Win32: Windows Installer.