32-bit computing refers to computer architectures with a processor, memory, and other major components that operate on 32-bit units of data. Compared to smaller bit widths, 32-bit computers can perform large calculations more efficiently and process more data per clock cycle. From the 1980s to about 2006, typical 32-bit personal computers had a 32-bit address bus, permitting up to 4 GiB of RAM to be accessed.