In practice, people (whether intentionally or unintentionally) often draw no distinction between the actual planning & control system and the computer-aided information system for planning & control, i.e., the logistics software. In recent years, this has led to unnecessary misunderstandings, and even to arguments and decisions based on prejudice. This chapter focuses on the main possibilities and limitations of the computerization of tasks and processes associated with planning & control. We shall first consider the historical development of logistics software and the extent to which it is used at present. This will be followed by a discussion of the types of software available and an attempt at classification. The chapter ends with some important notes concerning the implementation of logistics software.