diff --git a/book_src/Operating Systems From 0 to 1.txt b/book_src/Operating Systems From 0 to 1.txt
index edc4d09..5690a98 100644
--- a/book_src/Operating Systems From 0 to 1.txt	
+++ b/book_src/Operating Systems From 0 to 1.txt	
@@ -2107,7 +2107,7 @@ Bus
 ]Bus is a subsystem that transfers data between computer 
 components or between computers. Physically, buses are just 
 electrical wires that connect all components together and each 
-wire transfer a single big of data. The total number of wires is 
+wire transfer a single bit of data. The total number of wires is 
 called bus width[margin:
 bus width
 ]bus width, and is dependent on how many wires a CPU can support.