ISA meaning in Information Technology ?

Answer:

What is Instruction Set Architecture mean?

In computer science, an instruction set architecture (ISA), also called computer architecture, is an abstract model of a computer. A device that executes instructions described by that ISA, such as a central processing unit (CPU), is called an implementation.

In general, an ISA defines the supported instructions, data types, registers, the hardware support for managing main memory, fundamental features (such as the memory consistency, addressing modes, virtual memory), and the input/output model of a family of implementations of the ISA.

An ISA specifies the behavior of machine code running on implementations of that ISA in a fashion that does not depend on the characteristics of that implementation, providing binary compatibility between implementations. This enables multiple implementations of an ISA that differ in characteristics such as performance, physical size, and monetary cost (among other things), but that are capable of running the same machine code, so that a lower-performance, lower-cost machine can be replaced with a higher-cost, higher-performance machine without having to replace software. It also enables the evolution of the microarchitectures of the implementations of that ISA, so that a newer, higher-performance implementation of an ISA can run software that runs on previous generations of implementations.

If an operating system maintains a standard and compatible application binary interface (ABI) for a particular ISA, machine code will run on future implementations of that ISA and operating system. However, if an ISA supports running multiple operating systems, it does not guarantee that machine code for one operating system will run on another operating system, unless the first operating system supports running machine code built for the other operating system.

An ISA can be extended by adding instructions or other capabilities, or adding support for larger addresses and data values; an implementation of the extended ISA will still be able to execute machine code for versions of the ISA without those extensions. Machine code using those extensions will only run on implementations that support those extensions.

The binary compatibility that they provide make ISAs one of the most fundamental abstractions in computing.

reference

Full Form	Category
Illinois Science Assessment	Academic & Science
Ionic Strength Adjuster	Academic & Science
International Society of	Academic & Science
ISA - The International Society for Measurement and Control	Academic & Science
Association Internationale de Sociologie	Academic & Science
Asociación Internacional de Sociología	Academic & Science
International Society of Andrology	Academic & Science
Institution of Surveyors, Australia	Academic & Science
Indian Society of Anaesthesiologists	Academic & Science
International Society of Audiology	Academic & Science
Instrumentation Society of A	Academic & Science
Iteration Symmetry and Alternation	Academic & Science
International Students Association	Academic & Science
Islamic Students Association	Academic & Science
International Student Association	Academic & Science
International Student Advising	Academic & Science
Indian Student Association	Academic & Science
Internet Services for Alumni	Academic & Science
International Standard Architecture	Academic & Science
Interface Studio Architects	Academic & Science
International Standard On Auditing	Accounts and Finance
International Standard of Auditing	Accounts and Finance
Mount Isa	Airport Code
Information Systems Audit	Banking
Individual Savings Account	Banking
International Society of Appraisers	Business
International Society of Arboriculture	Business
International Sociological Association	Business
International Society of Automation	Business
Irish Software Association	Business
Income Share Agreement	Business
International Sales Agent	Business
Information Sharing Assessment	Business
Income Share Account	Business
Industry Sub-sector Analysis	Business
Isotechnika Pharma, Inc.	Business
International Sugar Agreement	Business
Investment Savings Account	Business
International Safety Auditors	Business
Interoperability Standards Advisory	Business
Intelligence And Security Agency	Business
Internal Security Agency	Business
International Standards on Auditing	Business
Santa Isabel, S. A.	Business
Instrumentation Systems and Automation	Chemistry
In Shaa Allah (at Allah's will)	Community
Independent Spiritualist Association	Community
In Shaa' Allah (God willing)	Community
Internationals Schools Assessment	Community
International School of the Americas	Community
International Schools Assessment	Community
Isaiah	Community
Integrity, Soul, and Attitude	Community
Instantaneous Self-Assessment	Community
Investigative Skills Assessment	Community
International Surfing Association	Community
Industrial Supply Association	Community
International Sign Association	Community
International Studies Association	Community
International Strabismological Association	Community
International Slackline Association	Community
Input Signal Amplifier	Computer Hardware
Information Sharing and Assessment	Computing
Internal Security Act	Computing
Internet Server Application	Computing
Internet Security Association	Computing
Internet Service Api	Computing
Internet Services Administrator	Computing
Information Security and Assurance	Computing
Independent Stations Algorithm	Computing
Identifier Splitting Algorithm	Computing
Informix Server Administrator	Computing
Itanium Solutions Alliance	Computing
Interactive Services Association	Computing
Integrated Service Adapter	Computing
Information Security Auditor	Computing
Information Sharing Agreement	Computing
Information Science Abstract	Computing
Informix System Administrator	Computing
Instrumentation Society of America	Electronics
Idle Speed Actuator	General
Intelligent Speed Assistance	General
Iveco South Africa	General
International Symbol of Access	General
Intelligent Speed Advice	General
International Security Alliance	General
Interplanetary Strategic Alliance	General
Independent Savings Account	General
Instruction Stable Alert	General
International Studies Abroad	General
Integrated Systems Analysts	General
Inside Surface of Assembly	General
Industrial Services of America	General
Internal Security Assessor	General
Individual Savings Accounts	General
Inside Sales Advisor	General
Institut de Selection Animale	General
Interim Service Agreement	General
Institute De Selection Animale	General
Institut de Sélection Animale	General
Integrated Starter Alternator	General
Incline Start Assist	General
Information Systems Architecture	Governmental
International Federation of the National Standardizing Associations	Governmental
Institute Of Self Actualization	Governmental
Institute for Self Actualisation	Governmental
Intelligent Speed Adaptation	Governmental
International Seabed Authority	Governmental
Independent Safeguarding Authority	Governmental
ISARDA	Indian Railway Station
Industry Standard Architecture	Information Technology
Instruction Set Architecture	Information Technology
Industrias Subsidiarias de Aviación	International
International Strategic Analysis	International
It's So Annoying	Internet
Internet Security Alliance	Internet
Independent Safety Assessor	Jobs
Interstitial Acute	Medical
Intrinsic Sympathomimetic Activity	Medical
Intensive Support Amount	Medical
International Standardization Agreement	Military and Defence
Inter-service Agreement	Military and Defence
Intelligence Support Activity	Military and Defence
Internet Security and Acceleration	Networking
Mount Isa, Australia	Regional
Interim Stowage Assembly	Space Science
Initial Sun Acquisition	Space Science
Iowa Soccer Association	Sports
International Slacklining Association	Sports
Innovative Slot Allocation	Telecommunication