DEFINITION of 'Security'. A security is a financial instrument that represents an ownership position in a publicly-traded corporation (stock), a creditor relationship with governmental body or a corporation (bond), or rights to ownership as represented by an option.
To add the Unit Converter to your iPhone or iPad home screen. Open the Unit Converter in Safari, click the Share button and select Add to Home Screen. To add the Unit Converter to your Android phone or tablet. Open the Unit Converter in the Android Chrome browser. Select the menu button and click Add to homescreen.
Window and Split-system AC Units. A window air conditioner unit implements a complete air conditioner in a small space. The units are made small enough to fit into a standard window frame. You close the window down on the unit, plug it in and turn it on to get cool air. If you take the cover off of an unplugged window unit, you'll find that it contains: 1  A compressor. 2  An expansion valve. 3  A hot coil (on the outside). 4  A chilled coil (on the inside). 5  Two fans. 6  A control unit.