COMPILATION LISTING OF SEGMENT apl_pendant_function_check_ Compiled by: Multics PL/I Compiler, Release 28d, of October 4, 1983 Compiled at: Honeywell LCPD Phoenix, System M Compiled on: 11/29/83 1613.4 mst Tue Options: optimize map 1 /* ****************************************************** 2* * * 3* * * 4* * Copyright (c) 1972 by Massachusetts Institute of * 5* * Technology and Honeywell Information Systems, Inc. * 6* * * 7* * * 8* ****************************************************** */ 9 10 /* Program to see if a specified function is pendent on the parse stack. 11* Written 731006 by DAM 12* Modified 740910 by PG for installation 13**/ 14 15 apl_pendant_function_check_: 16 procedure (fbp) returns (bit (1) aligned); 17 18 /* parameters */ 19 20 dcl 1 fbp aligned structure parameter, /* mismatch for aligned packed pointer */ 21 2 function_bead_to_check unaligned pointer; 22 23 /* automatic */ 24 25 dcl parse_frame_ptr unaligned pointer; 26 27 /* builtin */ 28 29 dcl null builtin; 30 31 /* program */ 32 33 /* this procedure returns "1"b if the specified function is pendant */ 34 35 do parse_frame_ptr = current_parse_frame_ptr repeat parse_frame.last_parse_frame_ptr 36 while (parse_frame_ptr ^= null); 37 38 if parse_frame_type = function_frame_type 39 then if parse_frame.function_bead_ptr = function_bead_to_check 40 then return("1"b); /* pendant (or suspended), this routine wants to treat them identically 41* since only smart routines like the editor can handle suspended 42* functions and SI damage. */ 43 end; 44 45 return("0"b); /* not found in stack so is not pendant */ 46 47 /* include files */ 48 1 1 /* ====== BEGIN INCLUDE SEGMENT apl_parse_frame.incl.pl1 ================================== */ 1 2 1 3 declare 1 parse_frame aligned based (parse_frame_ptr), 1 4 2 last_parse_frame_ptr ptr unaligned, /* pointer to last parse frame, or null */ 1 5 2 parse_frame_type fixed bin, /* suspended, function, eval input, etc. */ 1 6 2 function_bead_ptr ptr unaligned, /* ptr to function bead */ 1 7 2 lexed_function_bead_ptr ptr unaligned, /* ptr to lexed function bead */ 1 8 2 reduction_stack_ptr ptr unaligned, /* ptr to reduction stack for this frame */ 1 9 2 current_parseme fixed bin, /* element of reduction stack that is top of stack */ 1 10 2 current_lexeme fixed bin, /* element number of current lexeme */ 1 11 2 current_line_number fixed bin, /* line number being executed */ 1 12 2 return_point fixed bin, /* where to join the reductions on return */ 1 13 2 put_result fixed bin, /* where to put the value when returning to this frame */ 1 14 2 print_final_value bit(1) aligned, /* if true, print final value on line */ 1 15 2 initial_value_stack_ptr ptr unaligned, /* for cleaning up the value stack */ 1 16 2 number_of_ptrs fixed bin, /* number of old meaning ptrs */ 1 17 2 old_meaning_ptrs dim (number_of_ptrs refer (parse_frame.number_of_ptrs)) ptr unaligned; 1 18 /* old meanings for local variables. */ 1 19 1 20 declare number_of_ptrs fixed bin; 1 21 1 22 declare (suspended_frame_type init (1), /* for comparison with parse frame type */ 1 23 function_frame_type init (2), 1 24 evaluated_frame_type init (3), 1 25 execute_frame_type init (4), 1 26 save_frame_type init (5) 1 27 ) fixed bin internal static options (constant); 1 28 1 29 declare reductions_pointer pointer; 1 30 1 31 declare 1 32 1 reduction_stack aligned dim (1000) based (reductions_pointer), 1 33 2 type fixed bin, /* type of parseme */ 1 34 2 bits unaligned like operator_bead.bits_for_parse, 1 35 2 semantics ptr unaligned, 1 36 2 lexeme fixed bin, 1 37 1 38 1 reduction_stack_for_op aligned dim (1000) based (reductions_pointer), 1 39 2 type fixed bin, 1 40 2 bits unaligned like operator_bead.bits_for_parse, 1 41 2 semantics fixed bin, 1 42 2 lexeme fixed bin, 1 43 1 44 (eol_type init(0), /* parseme types - end of line */ 1 45 bol_type init(1), /* begining of line */ 1 46 val_type init(2), /* value */ 1 47 op_type init(3), /* op */ 1 48 open_paren_type init(4), 1 49 close_paren_type init(5), 1 50 open_bracket_type init(6), 1 51 close_subscript_type init(7), 1 52 close_rank_type init(8), 1 53 semi_colon_type init(9), 1 54 diamond_type init (10), 1 55 subscript_type init (11)) fixed bin internal static options (constant); 1 56 1 57 /* ------ END INCLUDE SEGMENT apl_parse_frame.incl.pl1 ---------------------------------- */ 49 2 1 /* ====== BEGIN INCLUDE SEGMENT apl_ws_info.incl.pl1 ====================================== */ 2 2 2 3 /* This structure contains all of the global data (or pointers to it) for the APL subsystem */ 2 4 2 5 /* automatic */ 2 6 2 7 declare ws_info_ptr ptr initial (apl_static_$ws_info_ptr.static_ws_info_ptr); 2 8 2 9 /* external static */ 2 10 2 11 declare 1 apl_static_$ws_info_ptr external static aligned structure, 2 12 2 static_ws_info_ptr unaligned pointer; 2 13 2 14 /* based */ 2 15 2 16 declare 1 ws_info aligned based (ws_info_ptr), 2 17 2 version_number fixed bin, /* version of this structure (3) */ 2 18 2 switches unaligned, /* mainly ws parameters */ 2 19 3 long_error_mode bit, /* if 1, long Multics format, else APL/360 format */ 2 20 3 debug_mode bit, /* if 1, system error causes escape to command level */ 2 21 3 canonicalize_mode bit, /* if 1, the editor canonicalizes user input */ 2 22 3 restrict_exec_command bit, /* if 1, the )EXEC command may not be used */ 2 23 3 restrict_debug_command bit, /* if 1, the )DEBUG command may not be used */ 2 24 3 restrict_external_functions 2 25 bit, /* if 1, the )ZFN, )MFN, and )DFN commands may not be used */ 2 26 3 restrict_load bit, /* if 1, the )LOAD and )COPY commands may not be used */ 2 27 3 restrict_load_directory bit, /* if 1, no directory allowed in )LOAD or )COPY pathnames */ 2 28 3 restrict_save bit, /* if 1, the )SAVE command may not be used */ 2 29 3 restrict_save_directory bit, /* if 1, no directory allowed in )SAVE pathnames */ 2 30 3 off_hold bit, /* if 1, )OFF HOLD was typed, else just )OFF */ 2 31 3 transparent_to_signals bit, /* if 1, any conditions slip right past APL */ 2 32 3 meter_mode bit, /* if 1, metering may be done, else speed is all-important */ 2 33 3 restrict_msg_command bit, /* if 1, the )MSG command may not be used. */ 2 34 3 compatibility_check_mode 2 35 bit, /* if 1, check for incompatible operators */ 2 36 3 no_quit_handler bit, /* if 1, do not trap QUITs. */ 2 37 /* remaining 20 bits not presently used */ 2 38 2 39 2 values, /* attributes of the workspace */ 2 40 3 digits fixed bin, /* number of digits of precision printed on output */ 2 41 3 width fixed bin, /* line length for formatted output */ 2 42 3 index_origin fixed bin, /* the index origin (0 or 1) */ 2 43 3 random_link fixed bin(35), /* seed for random number generator */ 2 44 3 fuzz float, /* comparison tolerance (relative fuzz) */ 2 45 3 float_index_origin float, /* the index origin in floating point */ 2 46 3 number_of_symbols fixed bin, /* the number of symbol_beads currently in existence */ 2 47 3 maximum_value_stack_size 2 48 fixed bin (18), /* maximum number of words in one segment of value stack */ 2 49 2 50 2 pointers, /* pointers to various internal tables */ 2 51 3 symbol_table_ptr unaligned pointer, /* -> symbol_table (apl_symbol_table.incl.pl1) */ 2 52 3 current_parse_frame_ptr unaligned pointer, /* -> topmost parse frame */ 2 53 3 value_stack_ptr unaligned pointer, /* -> next free location on value stack */ 2 54 3 alloc_free_info_ptr unaligned pointer, /* -> apl_storage_mngr_ data (apl_storage_system_data.incl.pl1) */ 2 55 2 56 2 time_invoked fixed bin(71), /* clock time that APL was entered */ 2 57 2 integer_fuzz float, /* the absolute fuzz used in checking for integers */ 2 58 2 user_number fixed bin(35), /* number under which the user is signed on */ 2 59 2 latent_expression unaligned pointer, /* -> value_bead for QuadLX */ 2 60 2 lock char(32), /* the lock currently set on this workspace (password) */ 2 61 2 wsid char(100), /* the workspace identification: name, number name, or clear ws */ 2 62 2 last_error_code fixed bin(35), /* last code passed to apl_error_ */ 2 63 2 signoff_lock character (32), 2 64 2 65 2 interrupt_info aligned, /* bits used by apl_interpreter_ to tell when to abort */ 2 66 3 dont_interrupt_parse bit, /* if 1, don't do a dirty stop because the parser is running */ 2 67 3 dont_interrupt_operator bit, /* if 1, don't do a dirty stop because an operator is running */ 2 68 3 dont_interrupt_storage_manager /* if 1, don't stop because apl_storage_mngr_ is */ 2 69 bit, /* munging his tables */ 2 70 3 unused_interrupt_bit bit, /* not presently used */ 2 71 3 dont_interrupt_command bit, 2 72 3 can_be_interrupted bit, /* if 1, OK to do a clean stop (we are between lines, reading) */ 2 73 3 clean_interrupt_pending bit, /* interrupt occured, break cleanly (between lines) */ 2 74 3 dirty_interrupt_pending bit, /* interrupt occured, break as soon as not inhibited */ 2 75 2 76 2 user_name char (32), /* process group id of user */ 2 77 2 immediate_input_prompt char (32) varying, /* normal input */ 2 78 2 evaluated_input_prompt char (32) varying, /* quad input */ 2 79 2 character_input_prompt char (32) varying, /* quad-quote input */ 2 80 2 vcpu_time aligned, 2 81 3 total fixed bin (71), 2 82 3 setup fixed bin (71), 2 83 3 parse fixed bin (71), 2 84 3 lex fixed bin (71), 2 85 3 operator fixed bin (71), 2 86 3 storage_manager fixed bin (71), 2 87 2 output_info aligned, /* data pertaining to output buffer */ 2 88 3 output_buffer_ptr unal ptr, /* ptr to output buffer */ 2 89 3 output_buffer_len fixed bin (21), /* length (bytes) of output buffer */ 2 90 3 output_buffer_pos fixed bin (21), /* index of next byte to write in */ 2 91 3 output_buffer_ll fixed bin (21), /* print positions used up so far */ 2 92 2 tab_width fixed bin (21); /* number of columns a tabs moves cursor */ 2 93 2 94 declare output_buffer char (ws_info.output_buffer_len) based (ws_info.output_buffer_ptr); 2 95 2 96 /* internal static */ 2 97 2 98 declare max_parse_stack_depth fixed bin int static init(64536); 2 99 2 100 /* ------ END INCLUDE SEGMENT apl_ws_info.incl.pl1 -------------------------------------- */ 50 3 1 /* ====== BEGIN INCLUDE SEGMENT apl_number_data.incl.pl1 ================================== */ 3 2 3 3 /* 3 4* This include file contains information about the machine representation of numbers. 3 5* In all programs numbers should simply be declared 'float'. 3 6* All default statements should be in this include file. 3 7* 3 8* This is the binary version. The manifest constant Binary should be used by programs 3 9* that need to know whether we are using binary or decimal. 3 10* */ 3 11 3 12 /* format: style3,initlm0,idind30 */ 3 13 3 14 default (float & ^decimal & ^binary & ^precision & ^constant) float binary (63); 3 15 3 16 declare ( 3 17 TheBiggestNumberWeveGot float initial (0.1701411834604692317e+39), 3 18 TheSmallestNumberWeveGot float initial (.1469367938527859385e-38), 3 19 Binary bit (1) aligned initial ("1"b) 3 20 ) internal static options (constant); 3 21 3 22 /* Number of characters in a number datum entry; used for copying float number arrays as strings. 3 23* (Obsolete! use array copies!) */ 3 24 3 25 declare NumberSize fixed binary precision (4) internal static initial (8); 3 26 3 27 /* ------ END INCLUDE SEGMENT apl_number_data.incl.pl1 ---------------------------------- */ 51 4 1 /* ====== BEGIN INCLUDE SEGMENT apl_bead_format.incl.pl1 ================================== */ 4 2 4 3 declare 1 general_bead aligned based, /* The Venerable Bead */ 4 4 2 type unaligned, 4 5 3 bead_type unaligned, 4 6 4 operator bit (1), /* ON if operator bead */ 4 7 4 symbol bit (1), /* ON if symbol bead */ 4 8 4 value bit (1), /* ON if value bead */ 4 9 4 function bit (1), /* ON if function bead */ 4 10 4 group bit (1), /* ON if group bead */ 4 11 4 label bit (1), /* ON if label bead */ 4 12 4 shared_variable bit (1), /* ON if shared variable bead */ 4 13 4 lexed_function bit (1), /* ON if lexed function bead */ 4 14 3 data_type unaligned, 4 15 4 list_value bit (1), /* ON if a list value bead */ 4 16 4 character_value bit (1), /* ON if a character value bead */ 4 17 4 numeric_value bit (1), /* ON if a numeric value bead */ 4 18 4 integral_value bit (1), /* ON if an integral value bead */ 4 19 4 zero_or_one_value bit (1), /* ON if a boolean value bead */ 4 20 4 complex_value bit (1), /* ON if a complex, numeric value bead */ 4 21 3 unused_bits bit (4) unaligned, /* pad to 18 bits (for future use) */ 4 22 2 size bit (18) unaligned, /* Number of words this bead occupies 4 23* (used by bead storage manager) */ 4 24 2 reference_count fixed binary (29); /* Number of pointers which point 4 25* to this bead (used by bead manager) */ 4 26 4 27 4 28 /* constant strings for initing type field in various beads */ 4 29 4 30 declare ( 4 31 operator_type init("100000000000000000"b), 4 32 symbol_type init("010000000000000000"b), 4 33 value_type init("001000000000000000"b), 4 34 function_type init("000100000000000000"b), 4 35 group_type init("000010000000000000"b), 4 36 label_type init("001001000011000000"b), 4 37 shared_variable_type init("001000100000000000"b), 4 38 lexed_function_type init("000000010000000000"b), 4 39 4 40 list_value_type init("000000001000000000"b), 4 41 character_value_type init("001000000100000000"b), 4 42 numeric_value_type init("001000000010000000"b), 4 43 integral_value_type init("001000000011000000"b), 4 44 zero_or_one_value_type init("001000000011100000"b), 4 45 complex_value_type init("001000000000010000"b), 4 46 4 47 not_integer_mask init("111111111110011111"b), /* to clear integral, zero_or_one bits */ 4 48 not_zero_or_one_mask init("111111111111011111"b) /* to clear zero_or_one bit */ 4 49 ) bit(18) internal static; 4 50 4 51 /* ------ END INCLUDE SEGMENT apl_bead_format.incl.pl1 ---------------------------------- */ 52 5 1 /* ====== BEGIN INCLUDE SEGMENT apl_operator_bead.incl.pl1 ================================ */ 5 2 5 3 declare 5 4 1 operator_bead aligned based, 5 5 5 6 2 type unaligned like general_bead.type, 5 7 5 8 2 bits_for_lex unaligned, 5 9 3 allow_brackets bit(1), /* operator may have dimension info in brackets */ 5 10 3 allow_product bit(1), /* operator may be used in inner and outer product */ 5 11 3 allow_reduction bit(1), /* operator may be used in reduction and scan */ 5 12 3 special_assignment bit(1), /* doesn't use standard assignment operator */ 5 13 3 ignores_assignment bit(1), /* assignment has no effect */ 5 14 3 allow_subscripted_assignment 5 15 bit(1), /* system variable that can be subscripted assigned */ 5 16 3 pad bit(12), 5 17 5 18 2 bits_for_parse unaligned, 5 19 3 stop_trace_control bit(1), /* next lexeme is function being stopped/traced 5 20* (op1 tells which) */ 5 21 3 quad bit(1), /* this is a quad type */ 5 22 3 system_variable bit(1), /* this is a system variable, not an op */ 5 23 3 dyadic bit(1), /* operator may be dyadic */ 5 24 3 monadic bit(1), /* operator may be monadic */ 5 25 3 function bit(1), /* operator is a user defined function */ 5 26 3 semantics_valid bit(1), /* if semantics has been set */ 5 27 3 has_list bit(1), /* semantics is a list */ 5 28 3 inner_product bit(1), /* op2 is valid */ 5 29 3 semantics_on_stack bit(1), /* semantics points to value stack */ 5 30 3 is_external_function bit(1), /* semantics points to function bead for ext function */ 5 31 3 pad bit(7), 5 32 3 op2 fixed bin(8) unaligned, /* secondary operator code */ 5 33 3 op1 fixed bin(8) unaligned, /* primary operator code */ 5 34 2 type_code fixed bin; /* for parse */ 5 35 5 36 /* ------ END INCLUDE SEGMENT apl_operator_bead.incl.pl1 -------------------------------- */ 53 54 end; SOURCE FILES USED IN THIS COMPILATION. LINE NUMBER DATE MODIFIED NAME PATHNAME 0 11/29/83 1346.9 apl_pendant_function_check_.pl1 >special_ldd>on>apl.1129>apl_pendant_function_check_.pl1 49 1 03/27/82 0439.0 apl_parse_frame.incl.pl1 >ldd>include>apl_parse_frame.incl.pl1 50 2 03/27/82 0439.2 apl_ws_info.incl.pl1 >ldd>include>apl_ws_info.incl.pl1 51 3 03/27/82 0429.8 apl_number_data.incl.pl1 >ldd>include>apl_number_data.incl.pl1 52 4 03/27/82 0438.5 apl_bead_format.incl.pl1 >ldd>include>apl_bead_format.incl.pl1 53 5 03/27/82 0439.0 apl_operator_bead.incl.pl1 >ldd>include>apl_operator_bead.incl.pl1 NAMES DECLARED IN THIS COMPILATION. IDENTIFIER OFFSET LOC STORAGE CLASS DATA TYPE ATTRIBUTES AND REFERENCES (* indicates a set context) NAMES DECLARED BY DECLARE STATEMENT. apl_static_$ws_info_ptr 000010 external static structure level 1 dcl 2-11 bits_for_parse 1 based structure level 2 packed unaligned dcl 5-3 current_parse_frame_ptr 15 based pointer level 3 packed unaligned dcl 2-16 ref 35 fbp parameter structure level 1 dcl 20 ref 15 function_bead_ptr 2 based pointer level 2 packed unaligned dcl 1-3 ref 38 function_bead_to_check parameter pointer level 2 packed unaligned dcl 20 ref 38 function_frame_type constant fixed bin(17,0) initial dcl 1-22 ref 38 general_bead based structure level 1 dcl 4-3 last_parse_frame_ptr based pointer level 2 packed unaligned dcl 1-3 ref 43 null builtin function dcl 29 ref 35 operator_bead based structure level 1 dcl 5-3 parse_frame based structure level 1 dcl 1-3 parse_frame_ptr 000100 automatic pointer unaligned dcl 25 set ref 35* 35* 38 38* 43 parse_frame_type 1 based fixed bin(17,0) level 2 dcl 1-3 ref 38 pointers 14 based structure level 2 dcl 2-16 static_ws_info_ptr 000010 external static pointer level 2 packed unaligned dcl 2-11 ref 2-7 type based structure level 2 packed unaligned dcl 4-3 ws_info based structure level 1 dcl 2-16 ws_info_ptr 000102 automatic pointer initial dcl 2-7 set ref 35 2-7* NAMES DECLARED BY DECLARE STATEMENT AND NEVER REFERENCED. Binary internal static bit(1) initial dcl 3-16 NumberSize internal static fixed bin(4,0) initial dcl 3-25 TheBiggestNumberWeveGot internal static float bin(63) initial dcl 3-16 TheSmallestNumberWeveGot internal static float bin(63) initial dcl 3-16 bol_type internal static fixed bin(17,0) initial dcl 1-31 character_value_type internal static bit(18) initial unaligned dcl 4-30 close_paren_type internal static fixed bin(17,0) initial dcl 1-31 close_rank_type internal static fixed bin(17,0) initial dcl 1-31 close_subscript_type internal static fixed bin(17,0) initial dcl 1-31 complex_value_type internal static bit(18) initial unaligned dcl 4-30 diamond_type internal static fixed bin(17,0) initial dcl 1-31 eol_type internal static fixed bin(17,0) initial dcl 1-31 evaluated_frame_type internal static fixed bin(17,0) initial dcl 1-22 execute_frame_type internal static fixed bin(17,0) initial dcl 1-22 function_type internal static bit(18) initial unaligned dcl 4-30 group_type internal static bit(18) initial unaligned dcl 4-30 integral_value_type internal static bit(18) initial unaligned dcl 4-30 label_type internal static bit(18) initial unaligned dcl 4-30 lexed_function_type internal static bit(18) initial unaligned dcl 4-30 list_value_type internal static bit(18) initial unaligned dcl 4-30 max_parse_stack_depth internal static fixed bin(17,0) initial dcl 2-98 not_integer_mask internal static bit(18) initial unaligned dcl 4-30 not_zero_or_one_mask internal static bit(18) initial unaligned dcl 4-30 number_of_ptrs automatic fixed bin(17,0) dcl 1-20 numeric_value_type internal static bit(18) initial unaligned dcl 4-30 op_type internal static fixed bin(17,0) initial dcl 1-31 open_bracket_type internal static fixed bin(17,0) initial dcl 1-31 open_paren_type internal static fixed bin(17,0) initial dcl 1-31 operator_type internal static bit(18) initial unaligned dcl 4-30 output_buffer based char unaligned dcl 2-94 reduction_stack based structure array level 1 dcl 1-31 reduction_stack_for_op based structure array level 1 dcl 1-31 reductions_pointer automatic pointer dcl 1-29 save_frame_type internal static fixed bin(17,0) initial dcl 1-22 semi_colon_type internal static fixed bin(17,0) initial dcl 1-31 shared_variable_type internal static bit(18) initial unaligned dcl 4-30 subscript_type internal static fixed bin(17,0) initial dcl 1-31 suspended_frame_type internal static fixed bin(17,0) initial dcl 1-22 symbol_type internal static bit(18) initial unaligned dcl 4-30 val_type internal static fixed bin(17,0) initial dcl 1-31 value_type internal static bit(18) initial unaligned dcl 4-30 zero_or_one_value_type internal static bit(18) initial unaligned dcl 4-30 NAME DECLARED BY EXPLICIT CONTEXT. apl_pendant_function_check_ 000012 constant entry external dcl 15 THERE WERE NO NAMES DECLARED BY CONTEXT OR IMPLICATION. STORAGE REQUIREMENTS FOR THIS PROGRAM. Object Text Link Symbol Defs Static Start 0 0 114 126 52 124 Length 404 52 12 242 41 0 BLOCK NAME STACK SIZE TYPE WHY NONQUICK/WHO SHARES STACK FRAME apl_pendant_function_check_ 70 external procedure is an external procedure. STORAGE FOR AUTOMATIC VARIABLES. STACK FRAME LOC IDENTIFIER BLOCK NAME apl_pendant_function_check_ 000100 parse_frame_ptr apl_pendant_function_check_ 000102 ws_info_ptr apl_pendant_function_check_ THE FOLLOWING EXTERNAL OPERATORS ARE USED BY THIS PROGRAM. return ext_entry NO EXTERNAL ENTRIES ARE CALLED BY THIS PROGRAM. THE FOLLOWING EXTERNAL VARIABLES ARE USED BY THIS PROGRAM. apl_static_$ws_info_ptr LINE LOC LINE LOC LINE LOC LINE LOC LINE LOC LINE LOC LINE LOC 15 000006 2 7 000017 35 000021 38 000027 43 000043 45 000046 ----------------------------------------------------------- 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