Java is a programming language and computing platform first released by Sun Microsystems in 1995. There are lots of applications and websites that will not work unless you have Java installed, and more are created every day.
IIS is able to impersonate the IUSR_<computername> account because the user name and password for this account are known by IIS. Before returning a page to the client, IIS checks NTFS file and directory permissions to see if the IUSR_<computername> account is allowed access to the file.
You do not have JavaScript enabled. The conversions on this site require the use of JavaScript so please enable before continuing. For assistance in enabling JavaScript, please contact the webmaster. IU stands for International Units and is used for the measurement of drugs and vitamins.