Making it simple, localhost as a web address connects to your local machine, where in this case you have Apache installed as web server. The second part, :8080, means connect to port 8080 of that web address. If you don't specify it, your web browser will connect to the default webserver port, which is port 80.
Employer Identification Number. The Employer Identification Number (EIN), also known as the Federal Employer Identification Number (FEIN) or the Federal Tax Identification Number, is a unique nine-digit number assigned by the Internal Revenue Service (IRS) to business entities operating in the United States for the purposes of identification.
FAQ / Is an employer ID number the same as a federal tax ID number? Yes, an employer identification number, or EIN, is also known as a taxpayer identification number, or TIN. A sole proprietorship that has no employees and files no excise or pension tax returns is the only business that does not need an employer identification number. In this instance, the sole proprietor uses his or her social security number as the taxpayer identification number.