I. Unix/Linux Character Sets:

• esc key: The Escape key on a keyboard.
• | (Vertical Bar): Used to represent the pipe character in computing. Often used to redirect output from one command to another.
• ~ (Tilde): A symbol often used to represent the home directory in Unix-like operating systems.
• ‘ (Single Quote): Used to define a single-quoted string in many programming languages.
• “ (Double Quote): Used to define a double-quoted string in many programming languages.
• ` (Back Quote/Backtick): Used for command substitution in Unix-like shells.
• / (Forward Slash): Used as a path separator in file systems and as a division operator in programming.
• \ (Backslash): Used as an escape character or path separator in Windows file systems.
• [] (Square Brackets): Used to denote arrays or list elements in programming.
• {} (Curly Braces): Used for grouping in programming and also in formatting strings.
• () (Parentheses): Used for grouping in expressions and function calls.
• # (Pound/Hash): Used for comments in many programming languages.