Having learned how to create collections, such as arrays, you now learn about Smalltalk Express methods that allow you to fill collections with information stored in files, and to move the information stored in collections into files. In particular, you learn how to obtain String, Integer, and Float instances from files.

Note, however, that file access tends to be implementation specific. Segment••missing reference••explains how to use VisualWorks to work with information stored in files.