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887:
96:
36:
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supported only on z/Architecture mainframes and runs exclusively in 64-bit mode. Application programmers can still use any addressing mode: all applications, regardless of their addressing mode(s), can coexist without modification, and IBM maintains a commitment to tri-modal backward compatibility. However, increasing numbers of
1235:
z/OS Management
Facility (z/OSMF) is enhanced to provide a plug-in named IBM zERT Network Analyzer. IBM zERT Network Analyzer is a web-based graphical user interface that z/OS network security administrators can use to analyze and report on data reported in zERT Summary records. With the zERT Network
1416:
IBM Z Anomaly
Analytics with Watson collects IT operational data from z/OS systems, uses historical IBM Z metric and log data to build a model of normal operational behavior, then analyzes real-time operational data through comparison with the model of normal operations to detect anomalous behavior,
1217:
With zERT, the TCP/IP stack acts as a focal point in collecting and reporting the cryptographic security attributes of IPv4 and IPv6 application traffic that is protected using the TLS/SSL, SSH and IPSec cryptographic network security protocols. The collected connection level data is written to SMF
1181:
z/OS supports 64-bit addresses for both virtual and real addresses. Within each address space, z/OS typically permits the placement of only data, not code, above the 2 GB "bar". z/OS enforces this distinction primarily for performance reasons. There are no architectural impediments to allowing
1159:
hardware), must have eliminated OS/390 from the system, and must e-mail IBM monthly sub-capacity reports. Sub-capacity billing substantially reduces software charges for most IBM mainframe customers. Advanced
Workload License Charges (AWLC) is the successor to VWLC on mainframe models starting with
1150:
z/OS introduced
Variable Workload License Charges (VWLC) and Entry Workload License Charges (EWLC) which are sub-capacity billing options. VWLC and EWLC customers only pay for peak monthly z/OS usage, not for full machine capacity as with the previous OS/390 operating system. VWLC and EWLC are also
922:
versions. Like OS/390, z/OS combines a number of formerly separate, related products, some of which are still optional. z/OS has the attributes of modern operating systems but also retains much of the older functionality that originated in the 1960s and is still in regular use—z/OS is designed for
1226:
In certain environments, the volume of SMF 119 subtype 11 records can be large. The zERT aggregation function provides an alternative SMF view of the collected security session data. This alternate view is written in the form of new SMF 119 subtype 12 records that summarize the use of security
1131:
mode, so it could function on older hardware, albeit without the ability to run 64-bit applications on those machines. (Only the newer z/Architecture hardware manufactured starting in the year 2000 can run 64-bit code.) IBM support for z/OS 1.5 ended on March 31, 2007, and since then, z/OS is
1404:
Operational data is data that z/OS system produces when it runs. This data indicates the health of the system and can be used to identify sources of performance and availability issues in the system. IBM Z Operational Log and Data
Analytics and IBM Z Anomaly Analytics with Watson collect IT
1096:(WLM) and dispatcher which automatically manages numerous concurrently hosted units of work running in separate key-protected address spaces according to dynamically adjustable goals. This capability inherently supports multi-tenancy within a single operating system image. However, modern
1268:
Another use of GDGs is to be able to address all generations simultaneously within a JCL script without having to know the number of currently available generations. To do this, you have to omit the parentheses and the generation number in the JCL when specifying the dataset.
1142:
z/OS is available under standard license pricing and via IBM Z New
Application License Charges (zNALC) and "IBM Z Solution Edition", two lower-priced offerings aimed at supporting newer applications ("new workloads"). U.S. standard commercial z/OS pricing starts at about
1244:
The z/OS Generation Data Group (GDG) is a description of how many generations of a file are to be kept and at what age a generation will be deleted. Whenever a new generation is created, the system checks whether one or more obsolete generations are to be deleted.
1236:
Analyzer, a z/OS network security administrator (typically a systems programmer with responsibility over z/OS Communications Server) can import SMF zERT summary records into a Db2 for z/OS database and then build and run custom queries against that data.
1188:
Memory is obtained as "Large Memory
Objects" in multiples of 1 MB (with the expectation that applications and middleware will manage memory allocation within these large pieces). There are three types of large memory objects:
1227:
sessions by many application connections over time and which are written at the end of each SMF interval. This alternate view condenses the volume of SMF record data while still providing all the critical security information.
1408:
IBM Z Operational Log and Data
Analytics collects IT operational data from z/OS systems, transforms it to a consumable format, and streams it to third-party enterprise analytics platforms like the Elastic Stack and
1151:
available for most IBM software products running on z/OS, and their peaks are separately calculated but can never exceed the z/OS peak. To be eligible for sub-capacity licensing, a z/OS customer must be running in
1208:
z/OS Encryption
Readiness Technology (zERT) monitors, records, and reports details of z/OS cryptographic network protection. It is a feature of z/OS V2R3 (and later releases) Communications Server component.
873:
1413:, or to the included operational data analysis platform. The included insights can help to visualize and search operational data to help identify the cause of operational issues.
316:
monthly license charge (MLC); pricing available based on actual use (VWLC, EWLC, AWLC, EAWLC, IWP); reduced pricing options (zELC, zNALC, "Solution
Edition") for many applications
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more than 2 GB of application code per address space. IBM has started to allow Java code running on z/OS to execute above the 2 GB bar, again for performance reasons.
2176:
1185:
Starting with z/OS version 2 release 3, code may be placed and executed above the 2 GB "bar". However, very few z/OS services may be invoked from above the "bar".
866:
1425:
IBM Z Operational Log and Data Analytics collects and analyzes both structured and unstructured data, including the following types of operational data:
859:
689:
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125 per month, including support, for the smallest zNALC installation running the base z/OS product plus a typical set of optional z/OS features.
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694:
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1935:
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24:
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IBM markets z/OS as its flagship operating system, suited for continuous, high-volume operation with high security and stability.
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and notifies IT operations of the anomalous behavior to identify incidents that might lead to business disruption.
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387:
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280:
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IBM Z Anomaly Analytics with Watson collects data from multiple IBM Z systems and subsystems, including
1821:
1199:
Common – where all address spaces can access the memory. (This type was introduced in z/OS Release 10.)
1136:
products and applications, such as DB2 Version 8 and above, now require and exploit 64-bit addressing.
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20:
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IBM Mainframe Security: Beyond the Basics – A Practical Guide from a z/OS & RACF Perspective
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certifies z/OS as a compliant UNIX operating system – with UNIX/Linux-style hierarchical
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operational data from z/OS systems, analyze and provide insights about the operational data.
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683:
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Shared – where the creating address space can give access to specific other address spaces.
1086:
1042:
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313:
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115:
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Das Betriebssystem z/OS und die zSeries: Die Darstellung eines modernen Großrechnersystems
8:
1781:
988:
2023:
1969:
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911:
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Some, e.g., TSO/E, are bundled with z/OS, others, e.g., CICS, are separately priced.
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Einführung in z/OS und OS/390: Web-Services und Internet-Anwendungen für Mainframes
1987:
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DEFINE GDG (NAME('DB2.FULLCOPY.DSNDB04.TSTEST') LIMIT(5) SCRATCH FOR(35))
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Job log, the output which is written to a data definition (DD) by a running job
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1041:. These compatibilities make z/OS capable of running a range of commercial and
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Creation of a standard GDG for five safety scopes, each at least 35 days old:
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1506:
914:, introduced by IBM in October 2000. It derives from and is the successor to
172:
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2508:
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MVS/System Product Version 3 (MVS/Enterprise Systems Architecture, MVS/ESA)
1511:
1441:
z/OS UNIX log file, including the UNIX System Services system log (syslogd)
1038:
586:
2171:
1936:"Things you should know about z/OS Encryption Readiness Technology (zERT)"
2419:
2365:
1501:
1054:
176:
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User application data, the operational data from users' own applications
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The purpose of GDGs is to automate archival, using the command language
1085:(QoS), even within a single operating system instance, and has built-in
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2432:
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Unshared – where only the creating address space can access the memory.
1133:
785:
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357:
103:
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659:
1575:, another specialty processor dedicated to particular z/OS workloads
1123:). Up through Version 1.5, z/OS itself could start in either 31-bit
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2390:
2161:
1256:
appears, the GDG name appears along with the history number, where
804:
459:
453:
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for z/OS. The following types of operational data are collected:
19:"ZOS" redirects here. For the Canadian television miniseries, see
2449:
2375:
2286:
2281:
1469:
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952:
886:
622:
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499:
414:
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IBM z/OS ISPF Smart Practices: Volume 2: ISPF Programmer's Guide
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1569:, a specialty processor dedicated to particular z/OS workloads
1203:
325:
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models. AWLC and EAWLC offer further sub-capacity discounts.
1015:
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363:
249:
133:
125:
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z/OS Resource Measurement Facility (RMF) Monitor III reports
1444:
Entry-sequenced Virtual Storage Access Method (VSAM) cluster
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IBM has dropped HFS starting with z/OS Version 2 Release 5.
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An IBM System Z10 mainframe computer on which z/OS can run.
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121:
95:
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MVS/System Product Version 2 (MVS/Extended Architecture,
1070:
1066:
919:
905:
592:
146:
108:
2006:"IBM Z Operational Log and Data Analytics documentation"
1970:"IBM Z Operational Log and Data Analytics Product Page"
1906:
z/OS 2.5 MVS Programming: Extended Addressability Guide
1456:
for z/OS High Performance Extensible Logging (HPEL) log
1111:
From its inception z/OS has had tri-modal addressing (
2046:
IBM z/OS ISPF Smart Practices: Volume 1: User's Guide
1715:
Vijayan, Jaikumar. "Z/OS: Users Expect Big Savings."
1692:"We are the IBM z/OS development team. AUA! • r/IAmA"
1100:
also offer two additional levels of virtualization:
2024:"IBM Z Anomaly Analytics with Watson documentation"
1472:for z/OS, IBM CICS Transaction Server for z/OS and
1065:-derived) along with other common services such as
1988:"IBM Z Anomaly Analytics with Watson Product Page"
935:z/OS supports stable mainframe facilities such as
393:7040/7044 Operating System (16/32K) (7040-PR-150)
2566:
1880:"Abstract for Planning for Sub-Capacity Pricing"
1218:in new SMF 119 subtype 11 records for analysis.
2132:Herrmann, Paul; Spruth, Wilhelm Gustav (2012).
2131:
2209:
2108:
1950:"z/OS Encryption Readiness Technology (zERT)"
867:
2223:
1391:DELETE DB2.FULLCOPY.DSNDB04.TSTEST GDG FORCE
1230:
918:, which in turn was preceded by a string of
208:Version 3.1 (V3R1) / September 29, 2023
1898:"Chapter 4. Using the 64-bit address space"
1204:z/OS Encryption Readiness Technology (zERT)
2216:
2202:
1916:. 2021-09-30. pp. 59–91. SA23-1394-50
874:
860:
344:History of IBM mainframe operating systems
16:64-bit operating system for IBM mainframes
2109:Teuffel, Michael; Vaupel, Robert (2010).
1722:19 November 2001, Vol. 35 Issue 47, p. 40
1420:
1262:(-1), (-2), ... are previous generations
73:Learn how and when to remove this message
1800:"Why System z for Business Integration?"
1400:Operational data collection and analysis
1239:
1176:
930:
885:
2089:
1860:"Entry Workload License Charges (EWLC)"
1689:
1252:, the file name given is generic. When
2567:
1581:for another mainframe operating system
25:Cañal Bajo Carlos Hott Siebert Airport
2197:
1607:MVS/System Product (MVS/SP) Version 1
1435:Log data from the following sources:
2066:
2043:
1601:OS/VS2 Release 2 through Release 3.8
1450:IBM Tivoli NetView for z/OS messages
1045:. z/OS can communicate directly via
29:
1221:
13:
2037:
45:tone or style may not reflect the
14:
2591:
2155:
1690:Giorgio, Anthony (30 July 2015).
1212:
1171:
2551:
2550:
1840:"Workload License Charges (WLC)"
1782:"IBM z/OS Communications Server"
1454:IBM WebSphere Application Server
1081:/SMB. z/OS is designed for high
1022:) APIs and applications through
94:
55:guide to writing better articles
34:
2575:IBM mainframe operating systems
2016:
1998:
1980:
1962:
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1265:(+1) a new generation (see DD)
1259:(0) is the most recent version
198:(V1R1, announced October, 2000)
2182:IBM Systems Mainframe Magazine
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1604:MVS/System Extensions (MVS/SE)
1592:
1497:OS/360 and successors#Timeline
998:z/OS also ships with a 64-bit
1:
2580:Proprietary operating systems
1677:
1532:Resource Measurement Facility
1517:Intelligent Resource Director
409:Miscellaneous S/360 line OSes
352:Early mainframe computer OSes
1643:Not to be confused with the
1598:Starting with the earliest:
1557:WebSphere Application Server
1481:System Management Facilities
1430:System Management Facilities
1164:, and EAWLC is an option on
595:(OS/VS2R2 and later) (1974)
275:(uniquely hardware-assisted)
7:
2167:Z Product Life Cycle Policy
2090:Dattani, Dinesh D. (2013).
1490:
10:
2596:
2177:IBM: z/OS Internet Library
1822:"More about zNALC pricing"
1272:
1018:infrastructure, and UNIX (
396:1410/7010 Operating System
303:, z/OS Management Facility
18:
2548:
2532:
2496:
2473:
2414:
2263:
2235:
2172:IBM: Shop zSeries (ShopZ)
2162:Official IBM z/OS website
1733:"IBM z/OS XL C/C++ | IBM"
1231:IBM zERT Network Analyzer
1020:Single UNIX Specification
320:
307:
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230:
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183:
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102:
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2465:Red Hat Enterprise Linux
2406:Red Hat Enterprise Linux
2255:Red Hat Enterprise Linux
1667:Not to be confused with
1585:
1486:z/OS system log (SYSLOG)
1447:z/OS system log (SYSLOG)
1340:
1279:
1053:, and includes standard
1338:Delete a standard GDG:
1089:clustering capability.
967:, record-oriented data
226:Enterprise / Mainframes
210:; 11 months ago
23:. For the airport, see
21:ZOS: Zone of Separation
2302:DOS/360 and successors
1421:Operational data types
1010:compiler based on the
925:backward compatibility
891:
480:DOS/360 and successors
358:GM OS & GM-NAA I/O
189:; 23 years ago
2314:OS/360 and successors
1757:"Main Page - Oss4zos"
1240:Generation Data Group
1177:64-bit memory support
1155:mode (which requires
931:Major characteristics
889:
543:OS/360 and successors
2067:Lanz, Franz (2015).
2044:Lanz, Franz (2015).
1623:MVS/ESA SP Version 5
1620:MVS/ESA SP Version 4
1043:open source software
1024:UNIX System Services
839:UNIX System Services
819:UNIX System Services
287:UNIX System Services
1938:. 31 December 2019.
239:and other languages
187:March 30, 2001
90:
2187:2015-02-06 at the
1083:quality of service
892:
88:
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2225:Operating systems
2138:Walter de Gruyter
2115:Walter de Gruyter
1104:and (optionally)
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83:
82:
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49:used on Knowledge
47:encyclopedic tone
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1806:. Archived from
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1788:. 24 April 2024.
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1759:. Archived from
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1562:Workload Manager
1527:Parallel Sysplex
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1094:Workload Manager
1087:Parallel Sysplex
995:, among others.
902:operating system
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613:Version 1 (1980)
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321:Official website
223:Marketing target
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53:See Knowledge's
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2189:Wayback Machine
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2038:Further reading
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1994:. 27 June 2024.
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1172:Other features
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1028:The Open Group
969:access methods
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2366:System/88 OS
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2133:
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2094:. MC Press.
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2018:
2009:
2000:
1991:
1982:
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1918:. Retrieved
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1854:
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1834:
1825:
1816:
1808:the original
1803:
1794:
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1765:. Retrieved
1761:the original
1751:
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1711:
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1512:Hitachi VOS3
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1138:
1110:
1091:
1061:, the other
1055:HTTP servers
1049:, including
1039:file systems
1014:open-source
997:
934:
894:
893:
695:VM/SE (SEPP)
634:
589:(SVS) (1972)
513:(1983, 1985)
444:RACS (1965)
232:Available in
169:Source model
69:
60:
44:
2420:workstation
1502:Fujitsu MSP
1092:z/OS has a
845:OpenSolaris
812:OpenEdition
805:OpenEdition
314:Proprietary
179:components.
177:open source
2569:Categories
2073:De Gruyter
2050:De Gruyter
1920:January 6,
1767:2009-12-21
1742:2023-12-04
1678:References
1483:(SMF) data
1432:(SMF) data
1134:middleware
1127:or 64-bit
1057:(one from
912:mainframes
569:OS/VS1 BPE
273:Monolithic
215:2023-09-29
194:2001-03-30
120:primarily
116:Written in
63:March 2021
2269:mainframe
1645:Macintosh
1002:runtime,
779:Unix-like
330:/products
256:Platforms
140:OS family
104:Developer
2556:Category
2519:Trillian
2514:Monterey
2504:Taligent
2497:Projects
2428:Textpack
2185:Archived
1491:See also
1364:SYSPRINT
1303:SYSPRINT
1026: –
803:MVS/ESA
743:TPF line
718:VM/XA SP
712:VM/XA SF
706:VM/XA MA
605:MVS/SE 2
587:OS/VS2R1
460:MUSIC/SP
388:MIT CTSS
281:Userland
2533:Related
2488:4690 OS
2483:4680 OS
2416:Desktop
2346:VM line
2292:TSS/360
2287:TOS/360
2282:BOS/360
1701:19 June
1470:IBM Db2
1273:Example
1125:ESA/390
953:IBM Db2
817:OS/390
810:VM/ESA
798:AIX/ESA
792:AIX/370
653:VM line
623:MVS/ESA
578:(1967)
559:(1968)
517:VSE/ESA
502:(1979)
500:DOS/VSE
488:DOS/360
456:(1972)
450:(1966)
427:TSS/360
421:TOS/360
415:BOS/360
309:License
294:Default
237:English
213: (
192: (
164:Current
2433:PC DOS
2381:zLinux
2334:OS/390
2319:OS/VS1
2265:Server
2144:
2121:
2098:
2079:
2056:
1696:reddit
1612:MVS/XA
1474:IBM MQ
1411:Splunk
1370:SYSOUT
1358:IDCAMS
1309:SYSOUT
1297:IDCAMS
1153:64-bit
1121:64-bit
1119:, and
1117:31-bit
1113:24-bit
1077:, and
1063:Apache
1047:TCP/IP
991:, and
965:IBM MQ
916:OS/390
899:64-bit
847:(2008)
841:(2001)
834:(2000)
827:(1999)
821:(1996)
814:(1995)
807:(1993)
800:(1991)
794:(1990)
788:(1981)
763:(2005)
757:(1979)
751:(1967)
732:(2000)
726:(1990)
724:VM/ESA
720:(1988)
714:(1985)
708:(1984)
702:(1980)
686:(1972)
684:VM/370
680:(1968)
678:VP/CSS
674:(1967)
665:(1967)
637:(2000)
631:(1995)
629:OS/390
625:(1988)
619:(1983)
617:MVS/XA
611:MVS/SP
607:(1979)
601:(1978)
599:MVS/SE
565:(1972)
563:OS/VS1
557:MFT II
553:(1966)
545:(1966)
531:(2021)
525:(2005)
519:(1991)
511:VSE/SP
496:(1972)
494:DOS/VS
490:(1965)
482:(1966)
462:(1985)
441:(1967)
435:(1967)
429:(1967)
423:(1965)
417:(1965)
390:(1961)
384:(1960)
378:(1959)
372:(1958)
366:(1957)
360:(1955)
267:Kernel
128:, and
2445:PC/IX
2438:DOS/V
2401:SRTOS
2371:IBM i
2277:IBSYS
1910:(PDF)
1901:(PDF)
1586:Notes
1579:z/VSE
1552:z/TPF
1547:SMP/E
1382:SYSIN
1346:STEP3
1321:SYSIN
1285:STEP1
1102:LPARs
1059:Lotus
1016:Clang
989:TSO/E
981:SMP/E
977:CLIST
941:COBOL
897:is a
837:z/OS
830:z/VM
825:Linux
761:z/TPF
700:VM/SP
669:CP-67
660:CP-40
523:z/VSE
454:MUSIC
439:ORVYL
382:IBSYS
364:BESYS
285:MVS,
250:SMP/E
175:with
126:HLASM
2455:OS/2
2391:DPPX
2386:DPCX
2339:z/OS
2142:ISBN
2119:ISBN
2096:ISBN
2077:ISBN
2054:ISBN
1922:2023
1703:2017
1573:zIIP
1567:zAAP
1537:SDSF
1349:EXEC
1288:EXEC
1160:the
1145:US$
1106:z/VM
1079:CIFS
1051:IPv6
1034:and
1012:LLVM
1000:Java
993:ISPF
973:REXX
957:RACF
949:PL/I
937:CICS
904:for
895:z/OS
777:and
775:UNIX
730:z/VM
672:/CMS
663:/CMS
635:z/OS
582:65MP
370:UMES
332:/zos
328:.com
301:ISPF
269:type
152:Unix
122:PL/X
89:z/OS
2524:K42
2460:AOS
2450:AIX
2396:SSP
2376:AIX
2361:CPF
2356:TPF
2351:ACP
2329:MVS
2324:SVS
2307:VSE
2297:RAX
2250:CNK
2245:INK
2229:IBM
2227:by
2028:IBM
2010:IBM
1992:IBM
1974:IBM
1955:IBM
1914:IBM
1884:IBM
1865:IBM
1845:IBM
1826:IBM
1804:IBM
1786:IBM
1737:IBM
1669:ZFS
1648:HFS
1542:SMF
1385:DD
1367:DD
1352:PGM
1324:DD
1306:DD
1291:PGM
1254:DSN
1250:JCL
1075:NFS
1071:FTP
1067:SSH
1036:zFS
1032:HFS
1008:C++
985:JCL
961:SNA
945:IMS
920:MVS
906:IBM
786:UTS
755:TPF
749:ACP
593:MVS
576:MVT
551:MFT
529:VSE
448:RAX
433:MTS
376:SOS
326:ibm
147:MVS
134:C++
109:IBM
2571::
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2267:,
2140:.
2117:.
2075:.
2071:.
2052:.
2048:.
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