Information about the conference and invitation.

expressing concern with no reply to the invitation

expressing regret that Ershov could not come to the conference; confirming the possibility to include his paper in the Proceedings

Information about the conference. Enclosed is the Conference Preliminary Announcement

informing that invitation to M.R. Shura-Bura was sent

Request for sending an abstract of presentation at the Conference on the History of Computing.

with detailed information on Ershov's forthcoming visit to the USA: about reimbursement and visa; contact phone numbers; enclosed are a form for foeign visiters to be completed and returned, an application for social security, information on the University of California reimbursement policy.

Covering letter to the preliminary program of the Conference on History of Computing; enclosed is a reservation form.