You can easily check your pulse on the inside of your wrist, below your thumb. 1  Gently place 2 fingers of your other hand on this artery. 2  Do not use your thumb, because it has its own pulse that you may feel.  Count the beats for 30 seconds, and then double the result to get the number of beats per minute.
It's not, LMB is Left Mouse Button. Its function can usually be replicated by the enter key.
The Scroll Lock key has appeared on the keyboards of IBM personal computers since the original 83-key PC/XT and the 84-key AT layouts, and remains on the 101-key and greater enhanced keyboards currently in use. The Scroll Lock key wasn't on the original Macintosh keyboards but appears on the Mac's enhanced keyboard. The main intent of the Scroll Lock key was to allow scrolling of screen text up, down and presumably sideways using the arrow keys in the days before large displays and graphical scroll bars.