Foreign Key
The Relationship Nobody Documents
Lambda Expressions
The Anonymous Functions That Almost Became a Career and Then Became Hindu Written by a Drunk Russian
Merge Conflict
The Moment Two Developers Discover They Were Both Right
NP-Completeness
The Art of Proving You Never Had a Chance
O Notation
The Mathematics of How Badly Things Scale, Practiced Instinctively by People Who Never Learned It
Ouroboros
The Serpent That Deploys Itself
Pointers
The Variable That Knows Where Something Is But Not What It Is
Quantum Computing
Perpetually Five Years Away Since 1981
Recursion
The Elegant Solution That Costs a Stack Frame Every Time It Believes in Itself
Stack Overflow
The Condition Where a Program Eats Its Own Memory and Discovers It Was Standing on It
The Compiler
The Last Adult in the Room
The Halting Problem
Or Will It? We May Never Know
The Knack of Computer Programming
Learning to Throw Yourself at the Machine and Miss
Turing Machine
The Infinite Tape That Proved Everything Is Computable Except Getting Your Printer to Work