This Adobe Bridge icon is made in Material Design style developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 4,300 icons, all in the same style and quality.
The icons for adobe are usually kept very simple. The one for "Adobe Bridge" just has the a capital letter B and a lower case r. Its the abbreviated version of the word. The adobe part is not represented in the logo because all adobe icons have a simple unique style that is consistent in the icons of the other programs.