What is another word for supervisor call instruction?
Pronunciation: [sˈuːpəvˌa͡ɪzə kˈɔːl ɪnstɹˈʌkʃən] (IPA) 
A supervisor call instruction, also known as a system call or privileged instruction, is a command that allows a program to access system resources that are not available to regular user applications. Depending on the operating system, there may be several synonyms for this instruction, such as trap instruction, interrupt call, or kernel call. In some cases, these terms may refer to more specific variations of the supervisor call instruction that are used for different types of system operations. Regardless of the terminology, however, the function of these instructions is to provide an interface between user applications and system-level functions to ensure efficient and secure operation of the system.
