I read the term "fundamentals" so frequently, but so rarely see them enumerated and defined. What are 'the fundamentals'? K&R? SICP? Someone once answered 'kno

I read the term "fundamentals" so frequently, but so rarely see them enumerated and defined. What are 'the fundamentals'? K&R? SICP? Someone once answered 'knowing your data structures and algorithms' but the only thing I see more than 'fundamentals' is a derisive attitude toward leetcode (which seems to be about par for 'knowing your data structures and algorithms').