An ITIN (Individual Taxpayer Identification Number, sometimes called a PIN, Tax ID or Taxpayer ID) will serve as your identification number for filing your tax returns. If you do not qualify for an SSN, you will need to apply for an ITIN.
Active Server Page Extended ASP.NET script. An aspx file extension is associated with Active Server Page Extended format used by Internet Information Services (IIS) web server with server side scripting language ASP.NET used to dynamically generate websites. Generated output from an .aspx page in your browser is common html page.
A file with the ASHX file extension is an ASP.NET Web Handler file that often holds references to other web pages used in an ASP.NET Web server application. The functions in the ASHX file are written in the C# programming language, and sometimes the references are so short that an ASHX file may end up just being a single line of code.