diff --git a/doc/manual/noteworthy-differences.rst b/doc/manual/noteworthy-differences.rst
index 0926b57c35ec6..ce1d88f7e9fbf 100644
--- a/doc/manual/noteworthy-differences.rst
+++ b/doc/manual/noteworthy-differences.rst
@@ -6,6 +6,39 @@
 Noteworthy Differences from other Languages
 *******************************************
 
+Noteworthy and unusual Julia features
+---------------------------------
+
+* Julia allows identifiers with complex Unicode, for example you could represent the value of a chi-squared test with ``χ²``,
+  similarly ``χ⁽³⁾`` is used in electromagnetism for the third-order nonlinear susceptibility, another example is ``∇²``
+  which is the name of the Laplacian operator. All of these Unicode symbols are valid Julia identifiers.
+
+  It can also be useful for caching powers of ``x`` to ensure that intermediate products are reused optimally in time-critical code. 
+  A classic example is in computing the [Lennard-Jones 12-6 potential energy](https://en.wikipedia.org/wiki/Lennard-Jones_potential) in computational chemistry and physics, in order to compute: 
+    
+  .. math::
+    
+      A/x^12 - B/x^6 
+        
+  one can write:
+
+  .. doctest::
+
+  "Lennard-Jones potential"
+  function lj(x, A, B)
+      x⁻² = x^-2
+      x⁻⁶ = (x⁻²)^3
+      x⁻¹² = (x⁻⁶)^2
+      A*x⁻¹² - B*x⁻⁶
+  end
+
+  .. note::
+  
+  Be wary about referencing a global variable while thinking it was an operator applied to a local variable and updating a
+  variable without remembering to update the cached value.
+
+* The ``/`` operator gives floating-point results for integer arguments, use ``div`` for truncating to an integer.
+
 Noteworthy differences from MATLAB
 ----------------------------------