diff --git a/README.md b/README.md
index 57451a3..3e60943 100644
--- a/README.md
+++ b/README.md
@@ -28,29 +28,29 @@ This Git repository is a comprehensive resource for the Computer Networks and Se
 - [Handout-A2](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-A2.pdf)
 - [Write-up - A2](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20A2.pdf)
 
-##### A4 - Error detection and correction using Hamming code and CRC
-- [Code-A4 (CRC)](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-A4%20%28CRC%29.cpp)
-- [Code-A4 (Hamming Code)](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-A4%20%28Hamming%20Code%29.cpp)
+##### A3 - Error detection and correction using Hamming code and CRC
+- [Code-A3 (CRC)](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-A3%20%28CRC%29.cpp)
+- [Code-A3 (Hamming Code)](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-A3%20%28Hamming%20Code%29.cpp)
+- [Handout-A3](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-A3.pdf)
+- [Write-up - A3](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20A3.pdf)
+- [Output-A3](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-A3.pdf)
+
+##### A4 - Sliding Window Protocol
+- [Code-A4](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-A4%20%28Sliding%20Window%29.cpp)
 - [Handout-A4](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-A4.pdf)
 - [Write-up - A4](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20A4.pdf)
 - [Output-A4](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-A4.pdf)
 
-##### A5 - Sliding Window Protocol
-- [Code-A5](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-A5%20%28Sliding%20Window%29.cpp)
-- [Handout-A5](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-A5.pdf)
-- [Write-up - A5](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20A5.pdf)
-- [Output-A5](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-A5.pdf)
-
 ##### B5 - Subnetting and subnet mask
 - [Handout-B5](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-B5.pdf)
 
 ##### B6 - Link state & distance vector
 - [Handout-B6](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-B6.pdf)
-- [Write-up - A6](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20A6.pdf)
+- [Write-up - A6](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20B6.pdf)
 
 ##### B7 - RIP/OSPF/BGP
 - [Handout-B7](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-B7.pdf)
-- [Write-up - A7](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20A7.pdf)
+- [Write-up - A7](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20B7.pdf)
 
 ##### B8 - TCP Socket
 - [Handout-B8](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-B8.pdf)