diff --git a/.gitignore b/.gitignore
index 5102a8f..7d6058b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -42,6 +42,7 @@ _ReSharper*/
 
 ## Intermediate documents:
 *.dvi
+*.xdv
 *-converted-to.*
 # these rules might exclude image files for figures etc.
  *.ps
@@ -309,4 +310,6 @@ $RECYCLE.BIN/
 # Windows shortcuts
 *.lnk
 
+
+
 # End of https://www.gitignore.io/api/linux,macos,windows
diff --git a/SigSys1_HS22-DESKTOP-03G7SJC.xdv b/SigSys1_HS22-DESKTOP-03G7SJC.xdv
deleted file mode 100644
index c655fbe..0000000
Binary files a/SigSys1_HS22-DESKTOP-03G7SJC.xdv and /dev/null differ
diff --git a/SigSys1_HS22.xdv b/SigSys1_HS22.xdv
deleted file mode 100644
index 8bf2ddd..0000000
Binary files a/SigSys1_HS22.xdv and /dev/null differ
diff --git a/TODO1.png b/TODO1.png
deleted file mode 100644
index 34c063d..0000000
Binary files a/TODO1.png and /dev/null differ