COLLECTED BY
The Open Syllabus collection contains WARC files from a mid-2021 crawl of about 50 million unique seed URLs extracted from the Open Syllabus version 2.6 dataset and their page requisites. The bulk of the seed URLs are from ".com", ".org", ".edu", and ".uk" TLDs.
Crawl Summary
- Crawl start: 2021-04-12
- Crawl end: 2021-09-05
- Seed URLs: 49,735,419
- Archived URLs: 338,690,414
- Collection Size: 25 TB
- Crawler: Heritrix/3.3.0-hq1-SNAPSHOT-2015-03-16T18:09:23Z
- Crawl depth: maxHops=0
Seed Summary
- Unique URLs: 49,735,419
- Unique Canonical URLs: 48,956,395
- Unique Hosts: 984,223
- IPv4 Addresses: 3,328
- Unique TLDs: 21,761
- Unique IANA Valid TLDs: 739
- Wayback Machine URLs*: 6,568,213
* NOTE: More than 13% URLs in the dataset point to Wayback Machine!
The Wayback Machine - https://web.archive.org/web/20210424184903/http://www.frobenius.com/ibsys.htm
IBM 7090/94 IBSYS Operating System
The IBSYS Operating System was supplied by IBM for the 7090/94 series. The system included a monitor program, the FAP assembler, FORTRAN II/IV, COBOL, and various utilities.
The FAP assembler was a modification of SAP (Symbolic Assembly Program) that was originally written by United Aircraft for the IBM 704 vacuum tube computer.
IBSYS Operating System Organization
| Input/Output Executor (IOEX) | Nucleus (IBNUC) | Supervisor (IBSUP) | Editor (IBEDT) | System Core Dump (SYSDMP) | |
|---|
| Utilities (DK90UT) | 9PAC Processor (9PAC) | Commercial Translator Processor (CT) | Input/Output Control System (IOCS) | Generalized Sorting System (SORT) | Restart Program (RESTART) | IBJOB Processor (IBJOB) | Symbolic Update Program (UPDATE) | FORTRAN II Processor (FORTRAN) |
|---|
| Utility Monitor | | Commercial Translator Monitor | | IBJOB Monitor | | FORTRAN II Monitor |
|---|
| Disk/Drum Utilities & Tape Dump | | Compiler, Loader, Symbolic Maintenance (MAIN), & Subroutine Updater (SUBUP) | | COBOL Compiler (IBCBC) | FORTRAN IV Compiler (IBFTC) | Macro Assembler (IBMAP), Loader (IBLDR), Subroutine Library (IBLIB), & Debugging Processor | | FORTRAN II Compiler & FAP Assembler (including IBSFAP) |
|---|
FAP and FORTRAN II could be used with either the IBM FORTRAN Monitor as an independent program or the same monitor as part of the 7090/94 IBSYS Operating System.
The Monitor was controlled with Control Cards that were identified with an asteric in column one.
An example Job Deck is:
*ID JOB NO. 3794 COZMIC (First Card in Job Deck -- Identified Beginning of Job)
* XEQ (...This Job is to be Executed...)
* FAP (Tells Monitor that Following Program is in FAP)
(FAP Source Deck -- Last Card is END)
FORTRAN (Tells Monitor that Following Program is in FORTRAN)
(FORTRAN Subroutine Source Deck -- Last Card is END)
FORTRAN
(FORTRAN Subroutine Source Deck -- Last Card is END)
DATA (Tells Monitor No More Source -- Data Follows...)
(Data Cards if Any)
The IBSYS operating system was a more comprehensive monitor that could run many different software packages depending on the needs of the current job. Control cards for IBSYS were identified by having a '$' in column one with a Control Name following immediately after the '$'.
An example Job Deck to run a FORTRAN program under IBSYS is:
$JOB (First Card of a job)
$EXECUTE IBJOB (Calls IBJOB Monitor that Contains the FORTRAN IV Compiler)
$IBJOB GO, (options) (Specified GO Execution Option in IBJOB)
$IBFTC DECK1 Options (Specified FORTRAM IV, Deck Name, and Compiler Options)
(Program Source)
$DATA (Data Follows)
7/8EOF (Last Card of a Job -- First Card Column has 7 and 8 punches :)
The IBSYS Operating System required eight tape drives with two channels in order to run.
If an IBM 1301 disc drive or a 7320 drum storage unit was available, then IBSYS could operate with only four drives. The FORTRAN Monitor alone (not part of IBSYS) required seven tape drives -- or six tape drives and a disc drive.
http://www.frobenius.com/ibsys.htm -- Last Revision: 23 August 2001
Copyright © 1996 - 2020 Jack Harper (unless otherwise noted)
