Caps Lock
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Caps Lock is a button on a computer keyboard that causes all letters of bicameral scripts to be generated in capital letters. It is a toggle key: each press reverses the previous action. Some keyboard
The Caps Lock key on a PC keyboard with US keyboard layout (near upper-left corner, below the Tab key and above the left Shift key)
Actuating the shift lock
Caps Lock on an Apple keyboard. The green LED on the key is lit, indicating that Caps Lock is on.
Modern keyboard that can exchange Caps Lock and left Control keys
Scroll Lock
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Scroll Lock or ScrLk is a lock key on most IBM-compatible computer keyboards. Depending on the operating system, it may be used for different purposes, and applications may assign functions to the key
The scroll-lock key with an activated indicator light on an IBM Model M keyboard