diff --git a/Usage.md b/Usage.md
index be0987b..6e96aa5 100644
--- a/Usage.md
+++ b/Usage.md
@@ -16,7 +16,7 @@ y - LUN ID - Optional but always 0.
 
 `HD10_512.hda` - Hard Disk at SCSI ID 1, LUN 0, sector size of 512.
 
-`HD6 - System 7 Quada 700.hda` - CD at ID 6, LUN 0, and 512 sector size.
+`HD6 - System 7 Quadra 700.hda` - CD at ID 6, LUN 0, and 512 sector size.
 
 `HD50_512 System 6.0.8L LC.hda` - Hard Disk at SCSI ID 5, LUN 0, sector size of 512. Text between block size and .hda is ignored.