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In computer science, a “word” is a basic unit of data that a computer’s processor can handle at one time. The size of a word, typically measured in bits, is a key characteristic of a computer’s architecture. Common word sizes include 16-bit, 32-bit, and 64-bit. A larger word size allows the processor to process more data simultaneously, which can lead to improved performance. The word size also affects the amount of memory that a computer can address directly. For example, a 32-bit system can address up to 4GB of memory, while a 64-bit system can address significantly more. The concept of a word is fundamental to understanding computer architecture and how software interacts with hardware.