The first of the visa US categories operate on a points system. Each applicant is assessed using a points test. Points are awarded for a number of valuable characteristics. Such as your level of competency with English and whether you have a job already organized for you in US. There is a required number of points for your VISA application to be accepted and this can range from 100 - 120 dependent of the exact visa type applied for. If you fall slightly short of the required number of points you may be accepted into the pool system. If you are accquring visa for US work visa types then chances are maximum for you.