If you want to learn about clothing companies, one of the best places to go would be the Apparel Search website.  Apparel Search is an online directory that provides several methods of learning about clothing companies.  One place on the site is to view the fashion company section.  This particular section is a company profile area for some of the apparel industries leading resources.
 
In an effort to make learning about a clothing company even easier, Apparel Search is currently constructing a new section that will be full of apparel company definitions (detailed descriptions and history) of numerous companies that are involved with fashion or textiles.
 
At this time, they are developing the United States Clothing Companies section.  In the future, they hope to move post definitions of companies in other locations of the world.
 
Learn more about the fashion industry directory from people that work in the industry.  You can do this at the Fashion Industry Network.
 
Note: Apparel Search hopes to have the United States Clothing Companies section completed before the end of July.