can someone give me the definition of Octal Numeration System and where I might find morre information about i

Answer 1

Octals are numbers in base 8. Think of the place-value system, but instead of using
(1000's)(100's)(10's)(1's)
places like we do in our decimal system, octals would have
(512's)(64's)(8's)(1's)
going up by powers of 8.

Octals are often used in old computer systems (pre-1990-ish). More commonly used today would be hexadecimals (base 16).

For more info, try http://en.wikipedia.org/wiki/Octal

Answer 2

The octal (base 8) numerical system became widely used in computer programming because it was easier to remember the numbers than binary. It is very easy to convert from binary to octal and back, only simple arithmetic is required. For example, given the binary number

110111001100

divide it into groups of three

110 111 001 100

remember that 001 = 1, 010 = 2 and 100 = 4 and add together the values where a 1 appears in each group, then the number becomes

6 7 1 4

in octal. Much easier to deal with than the long string of 1s and 0s

Answer 3

Octal is base 8. That means each digit is between 0 and 7, and each place represents an increasing power of 8. In octal, you would count 6, 7, 10, 11 .. 17, 20, 21, etc. 10 here would mean eight of course, not ten. 20 octal would mean sixteen (two times 8). As in base ten (the base we normally use), the rightmost place is the one's place. The one next to it is eights (instead of tens in our system), or eight to the first power. The next one is 64s (eight to the second power). Each one is increasing in powers.

Octal is used in some computer systems, and most commonly today in the C programming language where it is used to represent characters in numeric form.

Answer 4

http://www.macdonald.egate.net/CompSci/Pascal/hnumeration.html has the answer for you.
Octal is a number system that is based on 8 numbers ie: 0,1,2,3,4,5,6,7 would be the 8 numbers in the Octal system. These #'s are used in electronics and computer systems.

Answer 5

is based on the 8 instead of ten.

Answer 6

no sorry