9 of the Worldâs Deadliest Snakes. 1  9A dangerous African snake named for its black mouth. 2  8The barba amarilla (âyellow chinâ) of Latin America. 3  7One of the most dangerous snakes in Africa.  6The quintessential Australian 1  cobra. 5The killer of the most people.  4A dangerous snake with a triangular-shaped cross section.
The purpose of the Command key is to allow the user to enter keyboard commands in applications and in the system. The Macintosh Human Interface Guidelines have always recommended that developers use the Command key (and not the Control or Option keys) for this purpose.
The Num Lock button is often found on a keyboard's numerical keypad. Hemera Technologies/PhotoObjects.net/Getty Images. The Num Lock key is included on some computer keyboards to change the functionality of the number keys, enabling more functions and shortcuts to be built into the keyboard.