It is a computer program that does everything, it keeps track of all recipes, it helps by evaluating you brewing efficiency so that you get better results, it keeps a running inventory of what you have on hand, it can convert recipes you find on the net from all extract to all grain or anything in between. It can do just about anything a brewer would want like also checking to see if you are in the guidelines of color or IBU's (International Bittering Units) Its a little great program but Ive yet to figure it all out.