diff --git a/README.md b/README.md
index 45989e8..94f872d 100644
--- a/README.md
+++ b/README.md
@@ -305,6 +305,7 @@ Sorted alphabetically by company name and product name.
 - [Houston Instrument DMP-51/52 Series Brochure](https://archive.org/details/hi-dmp-51-52-brochure)
 - [Houston Instrument Omnigraphic Plotter Brochure](https://archive.org/details/TNM_Omnigraphic_Plotter_20171016_0228)
 - [Sweet-P Plotter Brochure and Price List](https://archive.org/details/bitsavers_enterCompuersonalPlotterprricelistBrochure_4929854) – Four-page color marketing brochure with attached suggested retail price list.
+- [IEEE Electronic Systems News Autumn (1985)](https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=5345111) – Review of the three-color Penman robotic plotter.
 
 ## Community