PHP 
PHP is a widely-used open-source scripting language that is especially suited for web-development and can be embedded into HTML.  PHP is often used for dynamic webpage creation and for online-database applications, but it can also perform any task that a CGI program can do.  PHP can talk across networks using IMAP, SNMP, NNTP, POP3, or HTTP.  PHP script is executed on the server.  The PHP scripting language is a project of the Apache Software Foundation.  For more information, see php.net.

PERL
Perl is a general-purpose programming language derived from C, sed, awk, the Unix shell, and a dozen other tools and languages.  Perl's process, file, and text manipulation facilities make it particularly well-suited for tasks involving quick prototyping, system utilities, software tools, system management tasks, database access, graphical programming, networking, and world wide web programming. These strengths make it especially popular with system administrators and CGI script authors.  For further information, visit perl.org or perl.com.

MySQL
MySQL is a fast and flexible open-source relational database management system (RDBMS).  It uses Structured Query Language (SQL), the most popular language for adding, accessing, and processing data in a database.  MySQL provides APIs for the languages C, C++, Eiffel, Java, Perl, PHP and Python. In addition, OLE DB and ODBC providers exist for MySQL data connection in the Microsoft environment. A MySQL .NET Native Provider is also available, which allows native MySQL to have .NET access without the need for OLE DB. MySQL is most commonly used for Web applications and for embedded applications and has become a popular alternative to proprietary database systems because of its speed and reliability.  For more information, visit mysql.com.

CSS
Short for Cascading Style Sheets, CSS is a recommendation of the World Wide Web Consortium (W3C) which gives authors and readers more control over the look and layout of webpages.  The use of CSS allows for simpler HTML/XML/XHTML code, and makes it faster and easier to impliment design-changes across an entire website.  CSS is often used in combination with a scripting language, such as PHP or JavaScript, to enable end-users to modify the look and layout of a website on-the-fly to suit their preferences.  For more information, visit the W3C's website.

JavaScript
JavaScript is an open-source scripting language developed by Netscape to allow Web-authors to create more dynamic, user-friendly websites.  It has become the most popular web-scripting language today.  Although JavaScript is typically embedded as small programs within webpages, it can also be used to build stand-alone applications that can run on either clients or servers.  For more information, refer to Netscape's JavaScript development website.

XHTML
XHTML is simply the newest evolution of HTML, the fundamental language from which websites are built.  The World Wide Web Consortium (W3C) released their recommendation for XHTML 1.0 in January of 2000, defining it as both the successor of HTML and as an XML application.  It brings the rigor
of XML to webpages and is the keystone in W3C's work to create standards that provide richer Web pages on an ever increasing range of browser platforms including cell phones, televisions, cars, wallet sized wireless communicators, kiosks, and desktops.  For more information, visit the W3C.

SSL
Short for "Secure Sockets Layer," SSL is a security protocol that provides communications privacy over the Internet.  SSL ensures that the information you send is sent, unchanged, only to the server you intended to send it to.  Online shopping sites frequently use SSL technology to safeguard credit card transactions.  SSL was developed by Netscape.  For more information, visit Netscape's Security Center.