The study was based on meetings and taped interviews with consultants, junior doctors and nursing staff, plus documentary evidence. The latter is not included in the records given to the Contemporary Medical Archives Centre, nor (with one exception) are the records of meetings, but the taped interviews have been deposited in full. The interviewees give pseudonyms rather than their actual names.

The Tunstall collection consists of signal books, both manuscript and printed, fighting instructions and essays concerning tactics. Among these are examples of some of the earliest signal books of about the time of the War of the Spanish Succession, but the bulk of the signal books and instructions date from the mid 18th to the early 19th century. Many have important additional notes and amendments made by various naval officers, including several by Admiral Richard Earl Howe and Admiral Sir John Jervis, the Earl of St Vincent. A secondary part of the collection consists of various naval pamphlets and printed books from the later 17th century to the 20th century. This includes a collection of pamphlets relating to the dispute between Admirals Thomas Mathews (1678-1751) and Richard Lestock which arose from a confusion over signalling and instructions. There is also a collection of military books, including some rare 16th century Italian examples collected by Sir Julian Corbett, and a number of small manuscript collections of correspondence, mainly that of naval officers.

This series comprises reports, papers, presentations by postal IT staff, handbooks and user guides relating to the different aspects of data processing in the Post Office. Although automatic data processing (ADP) was first introduced to the Post Office on a large scale with the LEAPS system in 1958, POST 113 focuses on ADP in the Post Office from the 1960s onwards. It charts the process of the introduction and implementation of ADP and computer applications and systems to different areas of postal work in order to capture data, streamline postal operational processes and generally improve the daily running of the Post Office.

Examples of material include: a number of reports from the 1960s on new proposals to implement ADP and several files which provide background to: the planning and control of ADP in the Post Office (POST 113/5), the structure of the Computer Development and Office Services Department (POST 113/10) and details of the different computer hardware already in place by the 1960s (POST 113/11).

This series also contains information on the different computer applications and systems proposed and implemented within the Post Office, such as PIVOT (POST 113/23-POST 113/25) and reviews undertaken by the Post Office and external organisations to suggest improvements to existing systems (for example, POST 113/21). In addition, there are files covering the Mails Circulation Project (POST 113/33 and POST 113/34) and the Counter Automation Project (POST 113/38 and POST 113/40).

Finally, there is information on IT strategies within the Post Office and details of the work of the National Data Processing Service (see POST 113/37 for details on the considerations of data protection and computers).There are also examples of computer handbooks and user guides in POST 113/41, POST 113/42 and POST 113/43.