to the parcel containing the book by P.Perkowski - Tecnika symulacji cyfrowej.

Invitation to the Second International Conference on Algol.

Confirmation of receiving "Algebra i Logika" journals

Request for information on microprocessors, support circuitry etc.

The letter treats problems of mixed computation. The attachments contain the author's articles on its application to LISP.

Prof. Dijkstra thanks A.p.Ershov for the booklet published in occasion of his 50th anniversary.

to the paper by W.C.Norris, president of Control data Corporation.

concerning Ershov's membership in ACM. (Tentative sense of the telegram.)

Notice for renewal of the subscription to IBM Systems Journal for 1981.

to the report TR 159, University of California, Irvine

Prof. Manacher is going to propose to NSF a grant for modernizing the design of Simula and asks whether A.P.Ershov is interested in collaboration.

to the members of IEEE Software Engineering Standards Subcommittee to reverify the address and status of each member.

to a short report on programming language Edison.

to reports 80-81 sent from Universite de Paris.Sud.