diff --git a/da/ct/ct_netcdf.py b/da/ct/io.py
similarity index 100%
rename from da/ct/ct_netcdf.py
rename to da/ct/io.py
diff --git a/da/ct/ct_observation_tools.py b/da/ct/obs.py
similarity index 100%
rename from da/ct/ct_observation_tools.py
rename to da/ct/obs.py
diff --git a/da/ct/ct_optimizer_tools.py b/da/ct/optimizer.py
similarity index 100%
rename from da/ct/ct_optimizer_tools.py
rename to da/ct/optimizer.py
diff --git a/da/ct/ct_statevector_tools.py b/da/ct/statevector.py
similarity index 100%
rename from da/ct/ct_statevector_tools.py
rename to da/ct/statevector.py
diff --git a/da/ct/ct_tools.py b/da/ct/tools.py
similarity index 100%
rename from da/ct/ct_tools.py
rename to da/ct/tools.py