Instructions to the authors of collected articles "A History of Computing in the Twentieth Century".

The author informs that reprints from "Lecture Notes in Physics" were not available. Homemade copy sent earlier should be replaced by the current one.

concerning important aspects of Ershov's and Pottosin's visit to the USA

discussing Prof. Knuth's possible plans for visiting USSR

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

on the possibility of participation in the international conference on the history of computing; enclosed is the letter form Los Alamos Scientific Laboratory proposing the idea of the conference and its translation into russian

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.

"Sorry about Mrs. Ershov accident..."

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