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Line 5: 18 binary digits have {{val\|262144}} (1000000 [[octal]], 40000 [[hexadecimal]]) distinct combinations. 18 bits was a common [[Word (computer architecture)\|word]] size for smaller computers in the 1960s, when large computers often ~~used~~using [[36-bit\|36 bit words]] and [[Six-bit character code\|6-bit character sets]], sometimes implemented as [[BCD (character encoding)\|extensions of BCD]], were the norm. There were also 18-bit teletypes experimented with in the 1940s. ==Example computer architectures==

18-bit computing: Difference between revisions