What's Memcached?
Memcached is a free and open-source distributed memory object caching system designed to speed up dynamic web applications by alleviating database load. It allows traditionally expensive (in terms of server CPU and RAM) database queries to be pulled from the Memcached server instead of your database. 

Fry! Stay back! He's too powerful! Oh, but you can. But you may have to metaphorically make a deal with the devil. And by "devil", I mean Robot Devil. And by "metaphorically", I mean get your coat. Why did you bring us here?

A Taste of Freedom
Oh, all right, I am. But if anything happens to me, tell them I died robbing some old man. Then throw her in the laundry room, which will hereafter be referred to as "the brig". With a warning label this big, you know they gotta be fun! Incidentally, you have a dime up your nose.