GOF	Mnemonic	Analogy	Hot Spot
Abs Factory	platform independence for a family of products	auto body parts stamping press	host "platform"
Builder	parse a complex representa., create one of several targets	assembling fast food kids' meals	creation of an aggregate's elements
Factory Meth	virtual creation through inheritance	injection molding form	subclass of object that is created
Prototype	virtual creation through delegation	biological cell division	class of object that is created
Singleton	guardian of the single instance	the office of the President	the sole instance of a class
Adapter	wrap a legacy component	1/2" to 1/4" socket adapter	interface of an object
Bridge	decouple interface and implementation	light switch on blueprint	implementation of an object
Composite	recursive composition	arithmetic expression	structure of an aggregate's elements
Decorator	add skins to the onion	Christmas tree, layered courier	responsibilities of an object
Facade	simple front-end to a complicated subsystem	telephone sales operator	interface of a subsystem
Flyweight	use sharing to optimize lots of "little" objects	the telephone system	storage cost of objects
Proxy	use a surrogate to control access	a check or bank draft	location and/or access of an object
Chain of Responsibility	single processing pipe, many possible handlers	vending machine coin slot	selection of a request's receiver
Command	encapsulate a request as an object	meal order at a restaurant	when and how a request is realized
Interpreter	map a domain grammar to a hier to solve domain problems	musician reading music	grammar and interp of a language
Iterator	decouple traversal of an aggregate object	secr accessing her file system	traversal of an aggregate's elements
Mediator	provide an intermediary to decouple many peers	airport control tower	interaction between peer objects
Memento	checkpoint/rollback an object's internal state	vendor source code in escrow	externalization of an object's internal state
Observer	decouple dependent "views" from the independent subject	auctioneer and bidders	dependent view(s) of an independent object
State	object's behavior morphs as its state changes	vending machine state machine	states of an object
Strategy	plug-compatible algorithms	getting to the airport	choice of algorithm
Template Meth	constant algorithm, replaceable steps	tract home builder's options	steps of an algorithm
Visitor	decouple operations on an aggregate object	the subway and an all-day pass	operations on an aggregate's elements