diff --git a/abacus.cabal b/abacus.cabal
index 495053b..b73a745 100644
--- a/abacus.cabal
+++ b/abacus.cabal
@@ -19,7 +19,8 @@ extra-source-files:
 
 library
   exposed-modules:
-      Lib
+      Abacus
+      Abacus.Internal
   other-modules:
       Paths_abacus
   autogen-modules:
diff --git a/src/Abacus.hs b/src/Abacus.hs
new file mode 100644
index 0000000..a374afb
--- /dev/null
+++ b/src/Abacus.hs
@@ -0,0 +1,40 @@
+{-|
+
+Module      : Abacus
+Description : Core functionality for a simple abacus program
+Copyright   : (C) Jonathan Lamothe
+License     : AGPL-3.0-or-later
+Maintainer  : jonathan@jlamothe.net
+Stability   : experimental
+Portability : POSIX
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public
+License along with this program.  If not, see
+<https://www.gnu.org/licenses/>.
+
+-}
+
+module Abacus (Abacus, newAbacus) where
+
+import Abacus.Internal
+
+-- | Constructs the initial state of a new "Abacus"
+newAbacus
+  :: Int
+  -- ^ The number of beads on each rung
+  -> Int
+  -- ^ The number of rungs
+  -> Maybe Abacus
+newAbacus = undefined
+
+--jl
diff --git a/src/Abacus/Internal.hs b/src/Abacus/Internal.hs
new file mode 100644
index 0000000..ae40b17
--- /dev/null
+++ b/src/Abacus/Internal.hs
@@ -0,0 +1,43 @@
+{-|
+
+Module      : Abacus.Internal
+Description : Core functionality for a simple abacus program
+Copyright   : (C) Jonathan Lamothe
+License     : AGPL-3.0-or-later
+Maintainer  : jonathan@jlamothe.net
+Stability   : experimental
+Portability : POSIX
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public
+License along with this program.  If not, see
+<https://www.gnu.org/licenses/>.
+
+# Important Note
+
+This module should only be imported directl by the Abacus module and
+the testing suite.  Anything contained herein should be considered
+subject to change without notice.
+
+-}
+
+module Abacus.Internal (Abacus (..)) where
+
+-- | Represents the state of an Abacus
+data Abacus = Abacus
+  { abacusNumBeads :: Int
+  -- ^ The number of beads per rung of the abacus
+  , abacusRows :: [Int]
+  -- ^ The number of beads slid across each rung
+  } deriving (Eq, Show)
+
+--jl
diff --git a/src/Lib.hs b/src/Lib.hs
deleted file mode 100644
index d36ff27..0000000
--- a/src/Lib.hs
+++ /dev/null
@@ -1,6 +0,0 @@
-module Lib
-    ( someFunc
-    ) where
-
-someFunc :: IO ()
-someFunc = putStrLn "someFunc"