diff --git a/process/core/io/data_structure_dicts.py b/process/core/data_structure/data_structure_dicts.py
similarity index 100%
rename from process/core/io/data_structure_dicts.py
rename to process/core/data_structure/data_structure_dicts.py
diff --git a/process/core/io/obsolete_vars.py b/process/core/data_structure/obsolete_vars.py
similarity index 100%
rename from process/core/io/obsolete_vars.py
rename to process/core/data_structure/obsolete_vars.py
diff --git a/process/core/io/variable_metadata.py b/process/core/data_structure/variable_metadata.py
similarity index 100%
rename from process/core/io/variable_metadata.py
rename to process/core/data_structure/variable_metadata.py
diff --git a/process/core/io/in_dat/base.py b/process/core/io/in_dat/base.py
index 21be3d153c..71bdd1b98a 100644
--- a/process/core/io/in_dat/base.py
+++ b/process/core/io/in_dat/base.py
@@ -13,8 +13,8 @@
 import sys
 from re import sub
 
+from process.core.data_structure.data_structure_dicts import get_dicts
 from process.core.exceptions import ProcessValidationError
-from process.core.io.data_structure_dicts import get_dicts
 from process.core.solver.constraints import ConstraintManager
 from process.core.solver.iteration_variables import ITERATION_VARIABLES
 from process.data_structure.numerics import PROCESSRunMode
diff --git a/process/core/io/mfile/comparison.py b/process/core/io/mfile/comparison.py
index eeb88efc2b..0125f3e738 100644
--- a/process/core/io/mfile/comparison.py
+++ b/process/core/io/mfile/comparison.py
@@ -12,7 +12,7 @@
 import numpy as np
 from numpy import isfinite
 
-from process.core.io.data_structure_dicts import get_dicts
+from process.core.data_structure.data_structure_dicts import get_dicts
 from process.core.io.mfile.base import MFile
 
 if TYPE_CHECKING:
diff --git a/process/core/io/plot/scans.py b/process/core/io/plot/scans.py
index d1325f59f4..c88a2c904e 100644
--- a/process/core/io/plot/scans.py
+++ b/process/core/io/plot/scans.py
@@ -35,8 +35,8 @@
 import numpy as np
 from matplotlib.ticker import MultipleLocator, PercentFormatter
 
+from process.core.data_structure.variable_metadata import var_dicts as meta
 from process.core.io.mfile import MFile
-from process.core.io.variable_metadata import var_dicts as meta
 from process.core.scan import ScanVariables
 from process.data_structure.numerics import SolverOutputCondition
 
diff --git a/process/core/io/vary_run/tools.py b/process/core/io/vary_run/tools.py
index 396b617c17..dc5f6d1e50 100644
--- a/process/core/io/vary_run/tools.py
+++ b/process/core/io/vary_run/tools.py
@@ -10,8 +10,8 @@
 from pathlib import Path
 from typing import TYPE_CHECKING
 
+from process.core.data_structure.data_structure_dicts import get_dicts
 from process.core.input import INPUT_VARIABLES
-from process.core.io.data_structure_dicts import get_dicts
 from process.core.io.in_dat import InDat
 from process.core.io.mfile import MFile
 from process.core.solver.iteration_variables import ITERATION_VARIABLES
diff --git a/process/core/scan.py b/process/core/scan.py
index 6c974a1a12..7109b1c932 100644
--- a/process/core/scan.py
+++ b/process/core/scan.py
@@ -13,8 +13,8 @@
 
 from process.core import constants, process_output
 from process.core.caller import write_output_files
+from process.core.data_structure.data_structure_dicts import get_dicts
 from process.core.exceptions import ProcessValueError
-from process.core.io.data_structure_dicts import get_dicts
 from process.core.log import logging_model_handler, show_errors
 from process.core.solver import constraints
 from process.core.solver.solver_handler import SolverHandler
diff --git a/process/main.py b/process/main.py
index ac155c4d68..6d07e2ef3c 100644
--- a/process/main.py
+++ b/process/main.py
@@ -39,8 +39,8 @@
 
 import process  # noqa: F401
 from process.core import constants, init
+from process.core.data_structure import obsolete_vars as ov
 from process.core.data_structure.base import DataStructure
-from process.core.io import obsolete_vars as ov
 from process.core.io.cli_tools import LazyGroup, help_opt, indat_opt
 from process.core.io.mfile import MFile
 from process.core.io.plot import plot_sankey_plotly, plot_summary