Answer:
Mnemonic devices help learning easier by coming up with some "nonsense" phrases like:
Please P Parenthesis
Excuse E Exponents
My M Multiplication
Dear D Division
Aunt A Addition
Sally S Subtraction
(Just an example)
Some might be more effective than others because they ae easier to remember.
Digital Camera; it allows the cinematographer to see the results instantly, there is no risk of imperfections, Image quality is phenomenally better, digital film is easier to manage and store than analog film.
To pretect the brain so people don't get brain damage