Letter In reply to the letter of 28.04.86, the author supports the addressee's idea to publish a special issue of the journal "New Generation Computing" on mixed computation, informs of another similar initiatives. /Handwritten text./ Date: 06.07.1986 Original document language: English Authors: Andrei Petrovich Ershov Organizations: Uppsala Univ. Persons: Erik Sandewall Addressee: Yoshihiko Futamura