--- a/content/hp34970a_4.rst	Thu Nov 05 23:28:39 2020 +0100
+++ b/content/hp34970a_4.rst	Sat Nov 07 15:45:09 2020 +0100
@@ -4,15 +4,15 @@
 
 :Author: David Douard
 :Category: Electronics
-:Tags: HP, 34970A, DMM, repair, test equipment
+:Tags: HP, 34970A, HP34970A, DMM, repair, test equipment
 :series: HP 34970A repair
 :series_index: 4
 
 
-After a summer pause, I'm back on my HP34970A replair project.  In
+After a summer pause, I'm back on my HP34970A repair project. In
 `the previous post in this series <{filename}/hp34970a_3.rst>`_, I've
-started to reverse ingineer the serial protocol between the CPU board
-and the fonrt panel, and implement a prototype of replacement display.
+started to reverse engineer the serial protocol between the CPU board
+and the front panel, and implement a prototype of replacement display.
 
 
 OLED display