The number of bits in a word (the word size, word width, or word length) is an important characteristic of any specific computer architecture.
The size of a word is CPU-specific.
The computing world is in transition from 8 bit, to 16 bit, to 32-bit to 64-bit computers.
- On Windows operating system: Windows - Cpu (Instruction Set Architecture and word size - 32 or 64 Bit)
- On Linux: CPU the architecture
The only limitation imposed is by the 32-bit or 64-bit mode of the process.
- A 64-bit OS can execute both 32-bit and 64-bit programs as the 64-bit mode is an upward extension of 32-bit mode.
- A 32-bit OS can only execute 32-bit programs.