diff --git a/doc/reference.rst b/doc/reference.rst
index a991d2823f06a46aed4f824fbc28fdb1d358fb8a..2a14d6a247b503185119602e4077ba732d84b27b 100644
--- a/doc/reference.rst
+++ b/doc/reference.rst
@@ -3,5 +3,5 @@ Reference
 
 .. automodule:: pytato.array
 .. automodule:: pytato.program
-.. automodule:: pytato.array_expr
 .. automodule:: pytato.scalar_expr
+.. automodule:: pytato.transform
diff --git a/pytato/array.py b/pytato/array.py
index 096cfc2e0b5c00c0112321c4b49bb2ae775e0577..54f6e32594e2f5893005dae63f5f46fd6eb846bb 100644
--- a/pytato/array.py
+++ b/pytato/array.py
@@ -179,7 +179,7 @@ class Namespace(Mapping[str, "Array"]):
         return len(self._symbol_table)
 
     def copy(self) -> Namespace:
-        from pytato.array_expr import CopyMapper, copy_namespace
+        from pytato.transform import CopyMapper, copy_namespace
         return copy_namespace(self, CopyMapper(Namespace()))
 
     def assign(self, name: str, value: Array) -> str:
diff --git a/pytato/array_expr.py b/pytato/transform.py
similarity index 97%
rename from pytato/array_expr.py
rename to pytato/transform.py
index fdd82028d312234f0654ca2908e6cbbdfde96fa7..76a1b4990bc1fc43d28302d449d40b6702e6920a 100644
--- a/pytato/array_expr.py
+++ b/pytato/transform.py
@@ -31,10 +31,10 @@ from pymbolic.mapper import Mapper as MapperBase
 from pytato.array import Array, IndexLambda, Namespace, Output, Placeholder
 
 __doc__ = """
-.. currentmodule:: pytato.array_expr
+.. currentmodule:: pytato.transform
 
-Tools for Array Expressions
----------------------------
+Transforming Computations
+-------------------------
 
 .. autoclass:: CopyMapper
 .. autofunction:: copy_namespace