diff --git a/math.txt b/math.txt
new file mode 100644
index 0000000..4441a73
--- /dev/null
+++ b/math.txt
@@ -0,0 +1,8 @@
+crossproduct
+dot3
+euler
+leibniz
+matrix
+pi
+tensor
+vector
diff --git a/physics.txt b/physics.txt
new file mode 100644
index 0000000..4383346
--- /dev/null
+++ b/physics.txt
@@ -0,0 +1,2 @@
+bra-ket
+newton