TACS'91 is the first International Conference on Theoretical
Aspects of Computer Science held at Tohoku University,
Japan, in September 1991. This volume contains 37 papers and
an abstract for the talks presented at the conference.
TACS'91 focused on theoretical foundations of programming,
and theoretical aspects of the design, analysis and
implementation of programming languages and systems. The
following range of topics is covered: logic, proof,
specification and semantics of programs and languages;
theories and models of concurrent, parallel and distributed
computation; constructive logic, category theory, and type
theory in computer science; theory-based systems for
specifying, synthesizing, transforming, testing, and
verifying software.