International Symposium on Mathematical Foundations of Computer Science Symposium on Mathematical Foundations of Computer Science Symposium om Mathematical Foundations of Computer Science Annual Symposium on Foundations of Computer Science Eighteenth Annual Symposium on Foundations of Computer Science Symposium on Mathematical Foundations of Computer Science (1972- ) 18th Annual Symposium on Foundations of Computer Science. 20th Annual Symposium on Foundations of Computer Science. 22nd annual symposium on Foundations of Computer Science / International symposium on mathematical theory of networks and systems /