how to recognize photoshop CS5 tools

recognize every tool available in Adobe Photoshop window as an initial step to facilitate our next step. Knowing does not mean we have to memorize one by one because the method of learning by rote will make us lose the creativity in creating a work of graphic art but more emphasis on the term "understand".
Recently Adobe has released the latest Photoshop CS5 software, Here is a screenshot of the various tools available in Adobe Photoshop CS5, which has been divided into sections