It contains a number of types of loans:
1- Simple method
2- American method
3- French method
4- Linear method or german
5- Geometric progression
6- Arithmetic progression
7- Prepayable interests
8- Partial Lack deferred
9- Lack Total deferred
10- Fractional A. Constant
11- Fractional French
12- Usufruct and bare ownership
13- Mortgage loan