The A64 architecture is a 64-bit instruction set architecture (ISA) developed by ARM Holdings. It is part of the ARMv8-A architecture family, which supports both 32-bit and 64-bit processing. A64 is designed to improve performance and efficiency in computing devices, making it suitable for a wide range of applications, from smartphones to servers. A64 features a simplified instruction set that allows for more efficient execution of programs. It supports advanced features like virtualization and cryptography, enhancing security and performance. This architecture is widely used in modern processors, contributing to the growth of mobile and embedded computing technologies.