From the back of the book:
You need every edge you can get.
On the streets of the Sprawl, you don't get a second chance if your opponent has the better equipment. Get yourself the latest gear, and know what they will be using against you.
RUNNING GEAR is a compilation of articles, both from the Internet and newly-written, to provide Shadowrun players with new and varied equipment. It covers topics such as weapons, explosives, drugs, and other vital needs for the serious shadowrunner.
RUNNING GEAR is an unofficial sourcebook for SHADOWRUN, SECOND EDITION.