This work explores the use of grammars as integral parts of 
computer programs and presents a number of tools and methods
which facilitate such integration. An embeddable interpreter 
for the Grammatical Framework (GF) grammar formalism, a compiler 
from GF grammars to speech recognition grammars, and methods 
for writing multimodal grammars in GF are described.
It is then shown how these tools and methods can be used to build 
multilingual multimodal dialog systems and precise domain-specific 
machine translation systems for both spoken and written language.