This level is called the Mixing Chamber, which is known by many as the computer lab. On this floor, there are places where people can use computers, printers, scanners, and many other resources, which are all free to the public. On this floor, there are also other private meeting rooms. This is a go-to place for many members of the Seattle community, and you also get an up-close look at the glass and steel that enclose the entire library. The escalator that leads to the Book Spiral is well-known across Seattle due to the massive collection within the library. The Seattle Central Public Library was the first library to introduce escalators into a Library.