diff --git a/docs/reference/systems_overview.md b/docs/reference/systems_overview.md
index 3f405c56d..369f6f17f 100644
--- a/docs/reference/systems_overview.md
+++ b/docs/reference/systems_overview.md
@@ -23,8 +23,8 @@ indicates systems with detailed User's Guide documentation.
 | **[IAU](../users_guide/systems/iau.md)**                           |            |   ✓   | International Astronomical Union standardized constants from official resolutions: nominal solar/planetary values (Resolution B3), astronomical unit (Resolution B2), CODATA 2018 gravitational constant and masses. Use for professional astronomy/astrophysics requiring IAU-standardized values. |     ✓      |
 | **Astronomy**                                                      |            |   ✓   | Common astronomy utility units not standardized by IAU: light-year, lunar distance, jansky, sidereal day, Julian/tropical year, century, millennium, gaussian gravitational constant. Use for general astronomy calculations.                                                                       |            |
 | **IEC**                                                            |            |   ✓   | IEC-standardized units including electrical (var), telecommunications (erlang, baud), and information technology (bit, byte). Use for electrical engineering and IT applications.                                                                                                                   |            |
-| **Typographic**                                                    |            |   ✓   | Units used in typography and desktop publishing (points, picas, etc.). Use for font design and publishing applications.                                                                                                                                                                             |            |
-| **HEP**                                                            |            |   ✓   | High-energy physics units (barn, electronvolt, particle masses). Use for high-energy physics experiments.                                                                                                                                                                                           |            |
+| **Typographic**                                                    |            |   ✓   | Typography and desktop publishing units: US/DTP points and picas, Didot point and cicero (European), Q and H (Japanese), TeX point. Use for font design, typesetting, and publishing applications.                                                                                                  |            |
+| **HEP**                                                            |            |   ✓   | High-energy physics units: electronvolt (_energy_), barn (_cross-section_), fermi (femtometre), _particle masses_ (electron, proton, neutron), _atomic mass unit_, fundamental constants (c, h, ℏ, e). Use for particle physics experiments and calculations.                                       |            |
 
 !!! note