You probably mean FICO which is Fair Isaac Corporation. The company who developed the financial scoring system to determine credit worthiness. There are many sites you can use. You are entitled to one free look per year at all three credit companies. EquiFax, TransUnion, Experian. FreeFico is one site.
FIFO is a method of merchandise accounting first in, first out.
Getting a great FICO score takes discipline and patience. Don't apply for multiple loans/credit cards in a short period of time. Pay in full whenever possible and NEVER pay late. Never max out available credit. You can keep an eye on your credit and get your credit score for free by using creditkarma.com. The site is safe, free and extremely useful.