IBM AS/400e

Operating System/400, 5769-SS1
492 AS/400e System Handbook
• System-wide database catalog allowing applications to query information concerning
all objects on a system using a single system catalog.
• Multiple-level concurrency control providing read stability, cursor stability, uncommitted
read, and no commit isolation levels.
• National language support to store data in a preferred language, character set (single
and double byte), and a sort sequence.
• Security up to Level 50: Level 50 provides C2 level of trust as defined by the U.S.
Government publication DOD 5200.28-STD,
Department of Defense Trusted Computer
System Evaluation Criteria.
Application Development facilities are provided in the optional DB2 Query Manager and
SQL Development Kit for AS/400 (5769-ST1) and the Application Developer's Toolset
(5769-PW1) in Licensed Programs section.
• Multiple Operating Environments:
In addition to the creation of native AS/400 applications, OS/400 allows the execution of
applications or programs migrated from the System/36 and System/38 with few or no
modifications required, or applications with a mixture of native and System/36 or
System/38 function. This means that applications can be migrated into completely native
AS/400 applications at a pace that suits the customer. See “System/36 Migration Aid,
5727-MG1” on page 648 and “System/38 Migration Aid, 5714-MG1” on page 641.
In addition, on all PowerPC-based models of the AS/400 system, it is possible to run
System/36 Operation System SSP Release 7.5 under OS/400, which allows System/36
applications to run unchanged on an AS/400 system.
Note: V4R4 is the last OS/400 release to support AS/400 Advanced 36 System Support
Program (SSP) running as a guest operating system and the associated AS/400
Advanced SSP products.
• Support for Central Site Maintenance:
OS/400 provides many capabilities to assist in the maintenance of a network of AS/400
systems from one central site. These include:
– Most application objects can be saved on a system and restored to another AS/400
system at the prior release level. Typically, the support is from the current release to
two release levels back.
– Screen copy image allows the image on one screen to be sent through a network of
AS/400 systems to another screen.
– Programs developed under Cross System Product/Application Development
(CSP/AD) on an IBM S/390 can be run under CSP/Application Execution (CSP/AE) on
an AS/400 system.