It is impractical to say, to list all the common business functions.If you want more info on Business functions & their parameters, please go through Standard JDE documention. There it will provide all the info about business functions & their parameter charecteristics. If you want to know which Business function is used more times and also in which applicaiton..., use the application P980012 to check. If you want to test the parameters of Bsfn by giving input values, you can test it by using the application P98bsfn. still if you want see some more info, use xref application (P980011). Hope this information will help u!!
Regards,Gov