HTML works by using beginning and ending tags around specified areas of text. These tags tell the web browser how to present the information. It rivals and sometimes surpasses the GIF format in it's ability to produce a quality image that takes up less space. The beauty of Perl is that it can be created and manipulated on the fly. That means the Perl code doesn't have to go through any compiling.
Pixels are the individual dots that make up an image.
The number of bits per pixels in a digital image defines the the color depth of the image. The greater the number of bits are per pixel, the bigger your file is going to be. The POST method is characterized by sending response headers to the server and then sending the captured data as standard output. The response headers gives the server information about your data that makes it easier for your server to decode it. The computer on which the server software runs.