ISA is a treaty-based intergovernmental organization that aims to scale up solar energy and reduce its cost. ISA stands for International Solar Alliance, not for any other acronym. The correct answer is Instruction Set Architecture. Key Points 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 ... The International Solar Alliance (ISA) is an alliance of more than 120 signatory countries, [1] most being sunshine countries, which lie either completely or partly between the Tropic of Cancer and the Tropic of Capricorn. ISA is the language of the CPU that tells it what operations it can perform, such as adding numbers, loading data, or jumping to another instruction. It defines how software communicates with hardware through specific instruction rules and formats.
