What's the difference among ASP.NET, ASP and PHP?

ASP.Net is faster than other scripting languages such as PHP and ASP.

What's the difference among SQL Server, Access and MYSQL?

Microsoft SQL Server is an Enterprise Database Management System, which is capable of handling millions of transactions efficiently and securely. Microsoft Access is a Desktop Database Management System, which is geared at small businesses with very few users. MySql is an open-source database management system with less features when compared to Microsoft SQL Server.

What are search engines?

To give you a few examples: yahoo.com, goto.com, msn.com, atlavista.com, excite.com -- In other words, these are the places you can go on the internet to search for whatever it is you are looking for -- information, products, people - whatever! There are approximately 20 major search engines and perhaps up to 100 additional engines that you can submit your website to.