Octal is a 5 letter English word. It's valid Scrabble word worth 7 points. It's valid Words with friends word worth 9 points.
You can make 75 anagrams from letters in octal (aclot).
First recorded in 1935-40; oct- + -al1
Memory registers 1-777 (octal) are available for use as normal memory registers if they are not being used as index registers.
This instruction will rotate the bits of the Accumulator right N positions, where N is octal digits 7-11 of the instructions word.
The contents of octal digits 0-5 of the index register location are unaffected by this instruction.
Normally, the machine would require 36 bits or 12 octal digits to be written for each instruction used in the machine.