The octal system is used for user permisions for access of dictionaries in Unix. One octal number can show 3 bits.
| decimal system | binary system | octal system |
|---|---|---|
| 0 | 0.000 | 00 |
| 1 | 0.001 | 01 |
| 2 | 0.010 | 02 |
| 3 | 0.011 | 03 |
| 4 | 0.100 | 04 |
| 5 | 0.101 | 05 |
| 6 | 0.110 | 06 |
| 7 | 0.111 | 07 |
| 8 | 1.000 | 10 |
Octal System