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.
The power supply unit is often abbreviated as PSU and is also known as a power pack or power converter. Motherboards, cases, and power supplies all come in different sizes called form factors. All three must be compatible to work properly together. A PSU is not usually user serviceable.