Browse Definitions:
Definition

SAA (Systems Application Architecture)

Contributor(s): Olivier Theizen

Systems Application Architecture (SAA) was IBM's strategy for enterprise computing in the late 1980s and early 1990s. It was replaced and considerably expanded by IBM's Open Blueprint , an enterprise strategy for network computing. Both of these are structured views of the types of computing services that an enterprise may need, the relationships between these services, and specification of the standards and products that are envisioned as providing these services.

SAA defined three layers of service:

  • Common User Access
  • Common Programming Interface
  • Common Communications Support

By using or creating applications and data that conformed to these three layers (provided by strategic IBM products), an enterprise could be assured of consistency and some amount of program portability among IBM's range of computer systems. As IBM, along with the rest of the computer industry, discovered the value of industry-wide standardization and open computing, the company revised its strategy. Its new strategy, the Open Blueprint, would recognize that customers wanted consistency and portability of programs and data across different manufacturers' systems, not just within IBM's systems. Two other trends not current when SAA was developed have influenced IBM's Open Blueprint: the client/server model of distributing computing and the concept and implementation of object-oriented programming . The Open Blueprint seems well positioned to absorb another new trend: network computing, including use of the Internet.

Since most of IBM's large customers have a large investment in legacy application s and data developed during the era of SAA and prior, IBM's Open Blueprint recognizes the need to support them. Notably, IBM's Systems Network Architecture ( SNA ), the keystone of the SAA Common Communications Support, is retained in the Open Blueprint as an alternative to TCP/IP . Other companies have also made investments in SAA, recognizing that IBM customers' legacy applications will not be going away soon and that in some cases these applications may represent the current best solution. Novell's Netware for SAA is an example of a widely-installed product that retains the SAA identity.

This was last updated in March 2011

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

SearchCompliance

  • smart contract

    A smart contract, also known as a cryptocontract, is a computer program that directly controls the transfer of digital currencies...

  • risk map (risk heat map)

    A risk map, also known as a risk heat map, is a data visualization tool for communicating specific risks an organization faces. A...

  • internal audit (IA)

    An internal audit (IA) is an organizational initiative to monitor and analyze its own business operations in order to determine ...

SearchSecurity

  • evil maid attack

    An evil maid attack is a security exploit that targets a computing device that has been shut down and left unattended.  An evil ...

  • Common Body of Knowledge (CBK)

    In security, Common Body of Knowledge (CBK) is a comprehensive framework of all the relevant subjects a security professional ...

  • rootkit

    A rootkit is a program or, more often, a collection of software tools that gives a threat actor remote access to and control over...

SearchHealthIT

  • value-based healthcare

    Value-based healthcare, also known as value-based care, is a payment model that rewards healthcare providers for providing ...

  • health informatics

    Health informatics is the practice of acquiring, studying and managing health data and applying medical concepts in conjunction ...

  • clinical trial

    A clinical trial, also known as a clinical research study, is a protocol to evaluate the effects and efficacy of experimental ...

SearchDisasterRecovery

  • crisis communication

    Crisis communication is a method of corresponding with people and organizations during a disruptive event to provide them with ...

  • Zerto

    Zerto is a storage software vendor that specializes in enterprise-class business continuity and disaster recovery in virtual and ...

  • crisis management plan (CMP)

    A crisis management plan (CMP) is a document that outlines the processes an organization will use to respond to a critical ...

SearchStorage

  • hard disk

    A hard disk is part of a unit -- often called a disk drive, hard drive or hard disk drive -- that stores and provides relatively ...

  • cache memory

    Cache memory, also called CPU memory, is high-speed static random access memory (SRAM) that a computer microprocessor can access ...

  • RAID 10 (RAID 1+0)

    RAID 10, also known as RAID 1+0, is a RAID configuration that combines disk mirroring and disk striping to protect data.

SearchSolidStateStorage

  • hybrid hard disk drive (HDD)

    A hybrid hard disk drive is an electromechanical spinning hard disk that contains some amount of NAND Flash memory.

Close