/XRL/14

ECH0003

2043VARS

 

 

 

i

(1)

A s s e m b l e r

 

 

 

131, 173, 196, 241, 267, 267, 267, 269, 269, 359, 359,

 

 

 

359, 364, 492

ECH0004

2043VARS

 

 

 

i

(1)

VSAM

 

 

 

15, 81, 110, 110, 110, 112, 114, 118, 118, 118, 118, 119,

 

 

 

119, 119, 119, 119, 121, 122, 122, 122, 123, 123, 123,

 

 

 

124, 125, 129, 130, 130, 131, 131, 290, 292, 292, 292,

 

 

 

292, 292, 292, 292, 387, 387, 455, 477, 477, 550, 550

ECH0005

2043VARS

 

 

 

i

(1)

bibliographies

 

 

 

206, 244, 244, 251, 353, 372, 478

ECH0006

2043VARS

 

 

 

i

(1)

Assembler macros

 

 

 

272, 273, 276, 277, 277, 277, 278, 278, 278, 278, 278,

 

 

 

279, 279, 280, 280, 281, 281, 281, 281, 281, 282, 283,

 

 

 

283, 285, 285, 286, 286, 286, 288, 289, 289, 290, 290,

 

 

 

290, 290, 290, 290, 290, 291, 291, 292, 292, 292, 296,

 

 

 

296, 297, 298, 298, 299, 299, 299, 300, 300, 300, 301,

 

 

 

301, 301, 304, 305, 305, 305, 306, 306, 306, 306, 307,

 

 

 

307, 307, 308, 308, 308, 309, 309, 313, 314, 314, 314,

 

 

 

314, 314, 327, 328

ECH0007

2043VARS

 

 

 

i

(1)

macros

 

 

 

98, 167, 268, 271, 272, 283, 289, 290, 292

ECH0008

2043VARS

 

 

 

i

(1)

FORTRAN

 

 

 

349, 349, 358

ECH0009

2043VARS

 

 

 

i

(1)

PL/I

 

 

 

131, 242, 331, 331, 331, 331, 340, 340, 342, 342, 342,

 

 

 

343, 343, 344, 345, 345, 346, 346, 347, 347, 351, 354, 356

ECH0010

2043VARS

 

 

 

i

(1)

DL/I

 

 

 

16, 154, 169, 169, 170, 171, 172, 174, 175, 175, 178, 366

ECH0011

2043VARS

 

 

 

i

(1)

conversion

 

 

 

42, 52, 52, 118, 163, 252, 258, 259, 259, 259, 259, 259,

 

 

 

265, 265, 267, 345, 349, 499, 503, 505, 516, 516, 517,

 

 

 

519, 519, 520, 522, 525

ECH0013

2043VARS

 

 

 

i

(1)

JES2

 

 

 

89, 90, 151, 207, 207, 207, 209, 209, 209, 210, 210, 210,

 

 

 

210, 211, 211, 211, 211, 211, 211, 211, 211, 213, 214,

 

 

 

215, 220, 221, 223, 225, 225, 225, 225, 227, 231, 231,

 

 

 

231, 395, 395, 395, 448, 449, 450, 452, 453, 475

ECH0014

2043VARS

 

 

 

i

(1)

RJE

 

 

 

219, 220, 220, 220, 227, 452, 453, 453

ECH0015

2043VARS

 

 

 

i

(1)

NJE

 

 

 

221, 221, 221, 221, 224, 227, 230, 233, 405, 415, 453,

 

 

 

454, 454

ECH0016

2043VARS

 

 

 

i

(1)

POWER

 

 

 

79, 89, 207, 209, 211, 225, 225, 225, 231, 231

ECH0017

2043VARS

 

 

 

i

(1)

JCL

 

 

 

25, 33, 69, 70, 72, 72, 72, 72, 72, 72, 72, 73, 73, 73, 73,

 

 

 

73, 75, 76, 76, 77, 78, 79, 79, 81, 81, 82, 84, 84, 84, 86,

 

 

 

88, 91, 92, 93, 241, 241, 344, 375, 409, 492, 516

ECH0018

2043VARS

 

 

 

i

(1)

Job Control Language

 

 

 

70, 82, 84, 451

ECH0019

2043VARS

 

 

 

i

(1)

data set

 

 

 

81, 99, 99, 116, 123, 123, 128, 128, 130, 132, 145, 159,

 

 

 

186, 202, 408, 438, 543, 547, 551

ECH0020

2043VARS

 

 

 

i

(1)

OS/390

 

 

 

19, 19, 19, 20, 23, 25, 38, 39, 70, 99, 100, 106, 106, 109,

 

 

 

110, 114, 114, 115, 129, 129, 129, 131, 178, 189, 189,

 

 

 

190, 192, 213, 242, 250, 329, 349, 352, 387, 390, 391,

 

 

 

393, 394, 394, 397, 398, 402, 405, 405, 406, 406, 413,

 

 

 

414, 415, 416, 430, 430, 430, 430, 431, 431, 431, 431,

 

 

 

432, 432, 433, 443, 443, 447, 447, 467, 497, 510, 518, 535

ECH0021

2043VARS

 

 

 

i

(1)

ISPF

 

 

 

390, 437, 437, 439, 440, 440, 440

ECH0022

2043VARS

 

 

 

i

(1)

FORTRAN

 

 

 

349, 358

ECH0023

2043VARS

 

 

 

i

(1)

migration

Page 659 Page 661
Page 660
Image 660
IBM OS/390 manual XRL/14, Dl/I, Nje, Power, Ispf
Page 659 Page 661

OS/390 specifications

IBM OS/390, a versatile operating system, was a cornerstone in enterprise environments and played a pivotal role in mainframe computing. Released in the mid-1990s, OS/390 combined the strengths of IBM's MVS (Multiple Virtual Storage) with new features and enhancements, targeting scalability, reliability, and performance in demanding business applications.

One of the key features of OS/390 was its robust support for multiple users and processes. The system allowed thousands of concurrent users to access applications and data, ensuring high availability and minimizing downtime—a critical requirement for many large organizations. This scalability was supported through various enhancements in memory management and processor scheduling, enabling optimal resource allocation across diverse workloads.

OS/390 was known for its superior workload management capabilities. The Workload Manager (WLM) component allowed administrators to define service policies, specifying how system resources would be allocated according to the priority of tasks. This ensured that critical business processes received the necessary resources while less critical tasks were managed more flexibly.

Another significant characteristic of OS/390 was its commitment to security. The operating system provided comprehensive security features, including user authentication, data encryption, and auditing capabilities. This focus on security was vital for organizations handling sensitive data, ensuring compliance with regulations and safeguarding against unauthorized access.

OS/390 also supported advanced technologies that facilitated integration and development. The system included features like the IBM CICS (Customer Information Control System) for transaction processing and IMS (Information Management System) for database management. These technologies allowed organizations to build robust, high-performance applications tailored to specific business needs.

The ease of network integration was another strength of OS/390. With the advent of the Internet and global connectivity, OS/390 systems could easily interface with various network protocols, enabling businesses to operate in a connected world. This inclusion paved the way for many organizations to expand their capabilities and offer new services, driving digital transformation.

In conclusion, IBM OS/390 represented a significant advancement in mainframe technology, combining scalability, security, and robust workload management. Its rich feature set and support for critical enterprise applications solidified its role as a vital component of many organizations' IT infrastructures, ensuring they could meet their operational challenges head-on while supporting future growth. As technology continues to evolve, the legacy of OS/390 remains influential in the realm of computing.
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