64-bit computing refers to a computer architecture that uses 64 bits to represent data and memory addresses. This allows for a significantly larger amount of memory to be accessed compared to 32-bit systems, which can only address up to 4 gigabytes of RAM. With 64-bit computing, systems can theoretically access up to 16 exabytes of RAM, enabling more efficient processing and multitasking. Additionally, 64-bit processors can handle larger data types and perform more complex calculations in a single operation. This capability is particularly beneficial for applications that require high performance, such as video editing, 3D rendering, and scientific simulations. As a result, most modern operating systems and software are designed to take advantage of 64-bit architecture.