As an alternative to the most commonly used PDF document format at present, the advantages of DjVu format (from France) are quite obvious: on the premise of storing the same content with same quality, it is much smaller, more readable and opens much faster than PDF. In this case, for any PDF documents with large file size, we might as well convert them into DjVu format, so as to get more convenience.

As a client-side script language supported by all web browsers, JavaScript is the foundation of realizing dynamic, interactive web pages, also the necessary part of Web 2.0 concept, and especially the core of Ajax technology now. In fact, JavaScript has become an essential part of most websites. And good JavaScript scripts can always improve users' Internet surfing experience.

Performance is the key to success of any websites. And as a matter of fact, the time a web browser loading a web page takes up about 80% of the total time consumed when a visitor is accessing this page. Thus, especially for the current rich media websites or web apps, speed is extremely important. In Even Faster Web Sites, you will learn how to save the valuable website loading time, so as to make your site respond to user's requests more quickly.

M+GUI (AKA: MAME Plus! GUI) is another new quality GUI front-end for MAME, developed by a fan player from China. We can see it as a fast Qt implementation of MameUI (that means they have similar functionality and user interface).

Image files often contain some unnecessary information (such as comments, EXIF tags, color profile, etc.). The image quality does not have any change after removing them, yet this can achieve the purpose of 'weight loss' to image file. And finally that will improve the image loading speed and take up less disk storage space.