A "21st century Domesday Book" - a snapshot of the United Kingdom seen through e-mails - is being compiled by the British Library.
The library is asking everyone in the UK to forward an e-mail from their inbox or sent mail box representing their life or interests.
Alternatively, people can submit a specially-composed message.
Each eligible e-mail received in May will be recorded and used to create the library's E-Mail Britain archive.
The e-mail address for those who wish to take part is email@emailbritain.co.uk