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.
â¢ Special keys â All of the other keys on the computer keyboard such as the function. keys, control keys, arrow keys, caps lock key, delete key, etc. Special keys on a PC Keyboard. â¢ Alt key â Short for Alternate, this key is like a second control key. â¢ Arrow Keys â Most keyboards have four arrow keys that enable you to move the. cursor (or insertion point) up, down, right, or left.