Tiny Identifier Dictionary

Haskellers often love their tiny identifiers, especially single letters and especially when they wrote the code. Other haskellers and especially non-haskellers hate them because they don't seem to mean anything, even when they do. Hopefully this dictionary can help!

Identifier(s)	Expansion	Domain	Description
f,g,h	function	Higher-order programming	A function of some sort
t	time	Simulation, interaction, domains involving time
t	type	Compilers, type-checkers etc
x,y,z	thingy, other thingy, wossname	Abstract code	Commonly used when we know nothing about the value in question
xs,ys,zs	(list of) lhingies	Abstract code	Lists of arbitrary values, or sometimes another collection type such as a set