You may avoid or severely limit encounters with other people-which can keep you from daily activities. You may develop physical symptoms such as a rapid heartbeat, shortness of breath, or tightness in your chest when faced with a feared social situation.
The apple tree (Malus pumila, commonly and erroneously called Malus domestica) is a deciduous tree in the rose family best known for its sweet, pomaceous fruit, the apple. It is cultivated worldwide as a fruit tree, and is the most widely grown species in the genus Malus.
It is just a nickname for the Apple OS (operating system). Apple likes the i in the beginning of many of it's products. Other examples of products are the iPad, iPhone, iPod, iMac. There is an Android OS, Symbian OS, Palm OS, Windows Mobile OS, Blackberry OS which are used in various smartphones.