PKZIP is the most popular compression program for the PC. It can compress many files comprising many megabytes of disk space, into one file which uses merely a fraction of the space. This is ideal for the web, because users can download an entire folder quickly. How it works is basically an algorythm which looks for repetition in the code, and substitutes a single character for each repeated string. In order to open a zipped file, you need PKUNZIP, or an equivelant utility. Most copies of Netscape come with PKUNZIP. On the Macintosh, Sutffit Expander can unzip, if you install Dropstuff with Expander Enhancer. For Windows/Windows95 users, if you cannot unzip on your system, download PKUNZIP from the original company at:
http://www.pkware.com/shareware/pkzip_win.html