I need to fill form. After a while I need to fill it again with same contest in same form. In my cell phone, I have the memory, I mean I'll starting filling again, for example six numbers, write first number, and it gave me all the whole number, I have just to select and click, and no boring typing again. Is it possible in Mac, too?

Yes, auto-completion is available but it depends on the application -- I believe it's on by default in Safari and Chrome [and other browsers], but I guess you'd have to RTM regarding other programs. Personally I often find it more distracting more than helpful..