Discuss singly$-$linked list $($SLL$)$ data structure and common operations used with SLL $($min of $2$ operations$).$ Use the appropriate technical terms followed by an explanation of each.

Provide a specific technical real$-$world technical example of where a singly$-$linked list would be used. Refrain from using non$-$technical analogies.

Discuss doubly$-$linked list $($DLL$)$ data structure and common operations used with DLL $($min of $2$ operations$).$ Use the appropriate technical terms followed by an explanation of each.

Provide a specific technical real$-$world technical example of where a doubly$-$linked list would be used. Refrain from using non$-$technical analogies.