Mnemonic Peg System
A peg system is a technique for memorizing lists. It works by pre-memorizing a list of words that are easy to associate with the numbers they represent (1 to 10, 1-100, 1-1000, etc.). Those objects form the "pegs" of the system. Then in the future, to rapidly memorize a list of arbitrary objects, each one is associated with the appropriate peg. Generally, a peglist only has to be memorized one time, and can then be used over and over every time a list of items needs to be memorized.
Many people have come across the peg list system via the books of Harry Lorayne.
It is generally considered by serious mnemonists as inferior to the Method of Loci which allows easier association between locations and the object being memorized.