on the panel discussion "Tough Nuts of Computer Science"

to the list of potential participants of the panel and to the comments on the panel discussion "Tough Nuts of Computer Science".

In the paper attached to the letter John McCarthy will focus on two topics: the present status of the Problems in the Theory of Computation and Common Business Communication Language.

The concise description of position statements of the panelists. (Handwritten and typewritten texts.)

The reminder to session chairmen.

It is the first letter about Panel discussion "Tough Nuts of Computer Science".

Joris Hartmanis thanks Ershov for the letter about Panel Discussion and "would be honored by an invitation to participate"

John McCarthy will be glad to participate in the proposed panel of "Tough Nuts of Computer Science"

The author proposes two "tough nuts" for the panel discussion.

Formal invitation to attend the 9th World Computer Congress and to participate in the Panel discussion.

Formal invitation to attend the 9th World Computer Congress and to participate in the Panel discussion.

Formal invitation to attend the 9th World Computer Congress and to participate in the Panel discussion.

Formal invitation to attend the 9th World Computer Congress and to participate in the Panel discussion.

Formal invitation to attend the 9th World Computer Congress and to participate in the Panel discussion.

Formal invitation to attend the 9th World Computer Congress and to participate in the Panel discussion.

Eric Sandewall asks to send the letter again because the envelope from Ershov was broken and empty.

Pr. Juris Hartmanis confirms his participation in the panel discussion.

Moris Nivat accepts the invitation to participate in the panel with pleasure.

Pr. Hoare regretfully declines to participate in the Congress panel discussion.