25:
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Architecture. Applications are added as services to the main server. Each client consumes the services via its own mailbox called "exchange" and well-published message formats. The communication works on "request codes" that are owned by the service. The operating system maintains the exchanges,
395:
The system shell was extensible, making it possible to define new commands. To get the parameters, the system would display the form which was to be filled out by the user. The input form had conventions for mandatory and optional input fields, which made it very easy to train new users.
391:
The spreadsheet allowed blocks of cells to be protected from editing or other user input. The BTOS version allowed scripts to be written that included opening the spreadsheet for user input, then automatically printing graphs based on the input data.
387:
was one of the first screen-oriented editors with many high-powered features, such as multiple views of the same file, cut/copy/paste, unlimited undo/redo, no typing lost after a crash or power failure, user-selectable fonts, and much more.
307:(IPC) is primarily based on the "request" and "respond" messaging foundation that enhanced the Enterprise Application Integration among services for both internal and external environments. Thus CTOS was well known for the message-based
260:
CTOS had many innovative features for its time. System access was controlled with a user password and Volume or disk passwords. If one knew the password, for example, for a volume, one could access any file or directory on that volume
291:
adapters using CTOS Cluster Hub-R12 designed by Paul
Jackson Ph.D. of SumNet Pty Limited in Australia. Each workgroup (called a "cluster") was connected to a server (called a "master"). The workstations, normally
265:). Each volume and directory were referenced with delimiters to identify them, and could be followed with a file name, depending on the operation, i.e. {Network Node}<DirectoryName>FileName.
42:
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message queues, scheduling, control, message passing, etc., while the service manages the messages at its own exchange using "wait", "check", and "respond" macros.
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89:
61:
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68:
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430:. Unisys was the single largest customer and acquired Convergent Technologies in 1988. At its peak, CTOS had over 800,000 users worldwide.
75:
462:
357:-like pattern-matching macro facility unmatched by almost any other assembler before or since. There was an always-resident debugger.
57:
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108:
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849:
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46:
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457:. The Coast Guard used the operating system from approximately 1984 until 2000. In Australia, CTOS/BTOS was used by the
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CTOS is no longer marketed to new customers. Former major customers included police forces, banks, airlines,
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465:'s, CSIRO, Commonwealth Electoral Office, Western Australia Prisons Department and many commercial banks.
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processor, which had CTOS as its operating system. This was a modular operating system with built-in
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415:. CTOS supported multiple processes or threads, and message-based interprocess communication.
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from the master, and could optionally be locally booted from attached hard drives.
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It was possible to custom-link the operating system to add or delete features.
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49: in this article. Unsourced material may be challenged and removed.
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used these databases for logistics administration for their vessels.
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131:
515:"When the mission is critical, leaders plug into BTOS workstations"
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407:' first product was the IWS (Integrated Workstation) based on the
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cables (daisy-chain topology) and in later versions carried over
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159:
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601:
Exhuming CTOS: The
Convergent Technologies Project, Nadia Ilyin
1085:
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18:
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made a commercial database application for CTOS that was in
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processor, a processor seldom used by standard PCs.
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549:Miller, Edna Ilyin; Crook, Jim; Loy, June (1991).
125:Convergent Technologies Operating System (CTOS)
426:(BTOS) who later merged with Sperry to become
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8:
360:Most of the system programs were written in
124:
322:computers, and could run concurrently with
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762:
634:
620:
612:
123:
58:"Convergent Technologies Operating System"
109:Learn how and when to remove this message
353:The assembler was very advanced, with a
230:Convergent Technologies Operating System
506:
418:Companies that licensed CTOS included
136:A Burroughs B25 computer running CTOS
7:
47:adding citations to reliable sources
586:CTOS Revealed, Byte, December 1994
14:
533:"Burroughs contracts with U-Haul"
468:Some Convergent systems used the
738:Object-oriented operating system
130:
23:
447:Drug Enforcement Administration
298:booted over the cluster network
34:needs additional citations for
1154:Discontinued operating systems
748:Supercomputer operating system
1:
1159:Proprietary operating systems
476:Progress Software Corporation
271:CTOS supported a transparent
244:, is a discontinued modular,
723:Just enough operating system
708:Distributed operating system
596:The CTOS FAQ Picture Archive
539:. June 23, 1986. p. 15.
836:User space and kernel space
372:which compiled directly to
305:Inter-process communication
179:; 44 years ago
1180:
743:Real-time operating system
591:Paul Mooney's CTOS Central
459:Trade Practices Commission
232:, also known variously as
939:Multilevel feedback queue
934:Fixed-priority preemptive
718:Hobbyist operating system
713:Embedded operating system
581:The CTOS FAQ October 1999
484:United States Coast Guard
455:United States Coast Guard
129:
1164:Unisys operating systems
982:General protection fault
733:Network operating system
687:User features comparison
728:Mobile operating system
405:Convergent Technologies
148:Convergent Technologies
831:Loadable kernel module
337:was presented to both
899:Process control block
865:Computer multitasking
703:Disk operating system
493:for CTOS running the
413:local area networking
248:, multiprocess-based
1070:Virtual tape library
662:Forensic engineering
495:Presentation Manager
489:There was a port of
435:Nationwide Insurance
368:-like language from
339:high-level languages
275:carried over serial
273:peer-to-peer network
43:improve this article
1079:Supporting concepts
1065:Virtual file system
463:NSW Auditor-General
443:U.S. Postal Service
126:
1002:Segmentation fault
850:Process management
606:Convergent archive
1136:
1135:
992:Memory protection
963:Memory management
957:
956:
949:Shortest job next
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843:
643:Operating systems
343:assembly language
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1091:Computer network
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608:at bitsavers.org
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521:. November 1989.
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250:operating system
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121:Operating system
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16:Operating system
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1035:Defragmentation
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997:Protection ring
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422:(STARSYS), and
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378:runtime library
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246:message-passing
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174:Initial release
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1045:File attribute
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1007:Virtual memory
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879:Context switch
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575:External links
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552:Exploring CTOS
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385:word processor
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826:Device driver
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767:Architectures
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566:0-13-297342-1
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557:Prentice Hall
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537:ComputerWorld
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285:star topology
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166:Working state
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60: –
59:
55:
54:Find sources:
48:
44:
38:
37:
32:This article
30:
26:
21:
20:
1022:file systems
914:Time-sharing
551:
536:
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467:
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359:
352:
332:
315:CTOS ran on
314:
302:
281:twisted pair
270:
267:
259:
241:
237:
233:
229:
227:
169:Discontinued
105:
96:
86:
79:
72:
65:
53:
41:Please help
36:verification
33:
1040:Device file
1030:Boot loader
944:Round-robin
869:Cooperative
805:Rump kernel
795:Multikernel
785:Microkernel
682:Usage share
470:Intel 80186
374:object code
333:The system
309:Microkernel
221:Proprietary
209:Microkernel
1143:Categories
970:protection
926:algorithms
924:Scheduling
873:Preemptive
819:Components
790:Monolithic
657:Comparison
501:References
409:Intel 8086
376:without a
324:Windows NT
155:Written in
99:April 2007
69:newspapers
1060:Partition
977:Bus error
904:Real-time
884:Interrupt
810:Unikernel
775:Exokernel
491:CorelDRAW
451:U.S. Army
424:Burroughs
263:hard disk
192:Platforms
143:Developer
1106:Live USB
968:resource
858:Concepts
696:Variants
677:Timeline
453:and the
349:Programs
294:diskless
256:Overview
1101:Live CD
1055:Journal
1019:access,
1017:Storage
894:Process
800:vkernel
667:History
650:General
296:, were
287:) with
242:STARSYS
216:License
182: (
83:scholar
909:Thread
780:Hybrid
758:Kernel
563:
482:. The
449:, the
445:, the
441:, the
439:U-Haul
428:Unisys
328:Unisys
289:RS-422
277:RS-422
203:Kernel
85:
78:
71:
64:
56:
1111:Shell
1050:Inode
400:Usage
370:Intel
366:ALGOL
364:, an
317:Intel
90:JSTOR
76:books
672:List
561:ISBN
420:Bull
383:The
362:PL/M
355:Lisp
341:and
330:PC.
303:The
240:and
238:BTOS
234:CTOS
228:The
205:type
184:1980
177:1980
160:PL/M
62:news
1128:PXE
1116:CLI
1096:HAL
1086:API
889:IPC
519:CIO
480:4GL
335:API
326:on
320:x86
196:x86
45:by
1145::
871:,
559:.
555:.
535:.
517:.
497:.
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261:(
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106:(
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97:(
87:·
80:·
73:·
66:·
39:.
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