  We replaced the classical string theory notions of parameter space and
world-time with noncommutative tori and consider maps between these spaces. The
dynamics of mappings between different noncommutative tori were studied and a
noncommutative generalization of the Polyakov action was derived. The quantum
torus was studied in detail as well as *-homomorphisms between different
quantum tori. A finite dimensional representation of the quantum torus was
studied and the partition function and other path integrals were calculated. At
the end we proved existence theorems for mappings between different
noncommutative tori.
