Established in 1944, the Unit is one of the largest and most long-lasting contributors to the development of psychological theory and practice. This section records the past work of the APU and the more recent work of the MRC CBU. It has been designed for use both by interested web surfers and by serious scholars of the History of Psychology. Below you can find a written overview of the history of the APU detailing some of the more significant work throughout the years, a digital archive containing a detailed look at the Unit’s research and influence on modern day life, a timeline that can be used to provide an illustrated historical overview of the Unit, and you can also watch from a selection of online films about the work of the APU at various points in its history.