You may install this font on more than one computer at a time. The computers may be in different locations such as a computer at work and a computer at home. The font can only be used in one place, by one person, at one time ... just like a book. Treat this font as if it were a book. You wouldn't photocopy a book and give the copies to your friends. If your friends like the font, tell them where they can buy their own.