Nothing (disambiguation)
Nothing is the concept of the absence of anything. Nothing or The Nothing may also refer to: == Mathematics, science and technology == === Computers === /dev/zero a special file in Unix-like operating systems that outputs zeros IEFBR14, an IBM mainframe utility program that acts as a placeholder whose purpose is to do nothing Null device, a special computer file, named /dev/null on Unix systems, that discards all data written to it Null, a value that a variable of nullable type in a computer program can take === Mathematics === 0 (number), the mathematical concept of the quantity of things in "nothing" Empty set, the mathematical concept of the collection of things represented by "nothing" === Physics and astronomy === Vacuum Vacuum solution (general relativity) Quantum vacuum state QED vacuum QCD vacuum Quantum fluctuation Bubble of nothing, mathematical instability in certain theories Boötes Void, also called the Great Nothing.