Octal: Difference between revisions

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 [http://en.wikipedia.org/wiki/Pdp-11 PDP-11] of [http://en.wikipedia.org/wiki/Digital_Equipment_Corporation DEC] used exclusively octal numeric system for memory addresses and content.
+[[Unix]] file system permissions have three sets (user, group, others) of three bit permissions (read, write, execute), which is naturally represented in octal.
-The use of octal numbers has declined as most modern computers no longer base their word length on multiples of three bits, (they are based on multiples of four bits).
+The use of octal numbers has declined as most modern computers no longer base their word length on multiples of three bits, (they are based on multiples of four bits, so [[hexadecimal]] is more widely used).
 == Comparing counts from zero in different number systems ==