:Info: scheduler.gi: 02/26/82 scheduler The module in the system that determines when a process is to run and how long it will run. It also notifies processes of events that have occurred such as timers, I/O events, and signals from other processes. :Info: search_rules.gi: 02/26/82 search rules A list of directories that are searched to find a command, subroutine, or data item referenced symbolically. Each directory is examined, in order, to find the given external name. Search rules are not used when a segment is addressed by its pathname, which explicitly specifies the directory containing the segment. :Info: segment.gi: 02/26/82 segment Basic unit of information within the Multics storage system. Each segment has access attributes, at least one name, and may contain data, programs, or be empty (null). :Info: short_name.gi: 03/05/82 short name The shortened version of a command or control argument name, used interchangeably with the full name. The short names are listed in individual command descriptions. :Info: shriek_name.gi: 02/26/82 shriek name A name, generated from a system clock value, that is guaranteed to be different from any other name so generated (e.g., !BBBnZNlqLQddRJg). See the description of the unique command. :Info: snap.gi: 02/26/82 snap (to snap a link) The process of finding that segment (and entry point in the segment) that is referenced by a link pair and replacing the link pair with a pointer to that entry point. This is part of the dynamic linking mechanism, by which external symbolic references (subroutine calls, PL/I external variables) are resolved while the program is running. :Info: source_segment.gi: 03/05/82 source segment A program that exists on line in language form. It must be converted to an object segment by compilation before it can be executed. :Info: standard_service_system.gi: sss.gi: SSS.gi: 02/26/82 standard_system_service (SSS) A group of commands and subroutines that are provided as part of the standard Multics system. They are located in the directories >system_library_standard, >system_library_unbundled, and >system_library_1. :Info: stack.gi: 02/26/82 stack A pushdown list where active procedures maintain private regions used for temporary variables and interprocedure communication. :Info: status_code.gi: 02/26/82 status code A value returned by a subroutine indicating either the success of or the reason for failure to accomplish the requested action. Associated with standard system error codes are certain predefined messages that tell what happened. :Info: storage_system.gi: 03/05/82 storage system The combination of hardware and software that Multics uses for storing information. The information is grouped into segments and catalogued in directories. See also directory_hierarchy.info. :Info: subsystem.gi: 02/26/82 subsystem A collection of programs that provide a special environment for some particular purpose, such as editing, calculation, or data management. It may perform its own command processing, file handling, and accounting. A subsystem is said to be closed if: 1. all necessary operations can be handled within the subsystem 2. no way exists to use the normal Multics environment from within the subsystem :Info: switch.gi: 02/26/82 switch A path in the I/O system through which information is sent. (See attach and detach.) :Info: SysDaemon.gi: sysdaemon.gi: 02/26/82 SysDaemon One of several system service processes that perform such tasks as process creation, backup, network control, and printing segments on the line printer. :Info: system_administrator.gi: 02/26/82 system administrator A person who has the access to register users, create projects, perform accounting runs, and perform other functions necessary for the administration of the system. :Info: system_control_dir.gi: sc1.gi: system_control_1.gi: 02/26/82 system_control_dir (sc1, system_control_1) The directory that contains those segments and directories used to control the operation of the system including the answer table, who table, person name table, project PDTs, etc. ----------------------------------------------------------- Historical Background This edition of the Multics software materials and documentation is provided and donated to Massachusetts Institute of Technology by Group BULL including BULL HN Information Systems Inc. as a contribution to computer science knowledge. This donation is made also to give evidence of the common contributions of Massachusetts Institute of Technology, Bell Laboratories, General Electric, Honeywell Information Systems Inc., Honeywell BULL Inc., Groupe BULL and BULL HN Information Systems Inc. to the development of this operating system. Multics development was initiated by Massachusetts Institute of Technology Project MAC (1963-1970), renamed the MIT Laboratory for Computer Science and Artificial Intelligence in the mid 1970s, under the leadership of Professor Fernando Jose Corbato. Users consider that Multics provided the best software architecture for managing computer hardware properly and for executing programs. Many subsequent operating systems incorporated Multics principles. Multics was distributed in 1975 to 2000 by Group Bull in Europe , and in the U.S. by Bull HN Information Systems Inc., as successor in interest by change in name only to Honeywell Bull Inc. and Honeywell Information Systems Inc. . ----------------------------------------------------------- Permission to use, copy, modify, and distribute these programs and their documentation for any purpose and without fee is hereby granted,provided that the below copyright notice and historical background appear in all copies and that both the copyright notice and historical background and this permission notice appear in supporting documentation, and that the names of MIT, HIS, BULL or BULL HN not be used in advertising or publicity pertaining to distribution of the programs without specific prior written permission. Copyright 1972 by Massachusetts Institute of Technology and Honeywell Information Systems Inc. Copyright 2006 by BULL HN Information Systems Inc. Copyright 2006 by Bull SAS All Rights Reserved