What do you mean pieces? Like Laptop components? If so then motherboard,ram,cpu, and psu for a basic laptop so 4 I guess (5 if you want to include a gpu).
HISTSIZE is the environment variable affects the number of past commands used in the current shell session.
Not really is she wants the words that she's typing down sometimes it's not necessary to leave it to the auto correct It can always be bad when re-reading it again.
Fish-eye because this is how you would see through a "fish eye" point of view in a rounded tank that is commonly used.
May I please have brainliest