This report summarizes the conclusions reached and difficulties encountered by Group E in the discussions held over the past 4 years. It is thus an amplification and extention of the report made to a meeting of the various computer Study Groups held on 27 May 1957.The Group consists mainly of actuaries employed by ordinary life assurance offices (some composite and some purely life). The Chairman is a member of the Mathematics Division of the National Physical Laboratory, Teddington. The Group has been joined from time to time by representatives of computer manufacturers and other visitors.