diff --git a/DisplayManager.cpp b/DisplayManager.cpp
new file mode 100644
index 0000000..29bed2c
--- /dev/null
+++ b/DisplayManager.cpp
@@ -0,0 +1,29 @@
+#include "DisplayManager.h"
+#include <iostream>
+
+DisplayManager::DisplayManager(HashTable* ht, BinarySearchTree* bst) {
+    this->hashTable = ht;
+    this->bst = bst;
+}
+
+DisplayManager::~DisplayManager() {
+    // No dynamic memory allocation, so no cleanup needed
+}
+
+void DisplayManager::displayAll() const {
+    std::cout << "All CPUs in the database:" << std::endl;
+    
+    // Iterate over the HashTable and display each CPU
+    for (int i = 0; i < hashTable->getSize(); i++) {
+        if (hashTable->getItem(i) != nullptr) {
+            std::cout << *(hashTable->getItem(i)) << std::endl;
+        }
+    }
+}
+
+void DisplayManager::displayTree() const {
+    std::cout << "CPU Binary Search Tree:" << std::endl;
+    
+    // Call the BST's inorder traversal method to display the tree
+    bst->inorderTraversal();
+}
\ No newline at end of file
diff --git a/DisplayManager.h b/DisplayManager.h
new file mode 100644
index 0000000..83a1b51
--- /dev/null
+++ b/DisplayManager.h
@@ -0,0 +1,22 @@
+#ifndef DISPLAY_MANAGER_H
+#define DISPLAY_MANAGER_H
+
+#include "HashTable.h"
+#include "BinarySearchTree.h"
+#include "CPU.h"
+
+template<typename T>
+class DisplayManager {
+private:
+    HashTable* hashTable;
+    BinarySearchTree* bst;
+
+public:
+    DisplayManager(HashTable* ht, BinarySearchTree* bst);
+    ~DisplayManager();
+
+    void displayAll() const;
+    void displayTree() const;
+};
+
+#endif
\ No newline at end of file
diff --git a/SearchManager.cpp b/SearchManager.cpp
new file mode 100644
index 0000000..8e642c3
--- /dev/null
+++ b/SearchManager.cpp
@@ -0,0 +1,27 @@
+#include "SearchManager.h"
+#include <iostream>
+#include <string>
+
+SearchManager::SearchManager(HashTable* ht) {
+    this->hashTable = ht;
+}
+
+SearchManager::~SearchManager() {
+    // No dynamic memory allocation, so no cleanup needed
+}
+
+void SearchManager::searchCPU() const {
+    std::string cpuID;
+    std::cout << "Enter the CPU ID to search: ";
+    std::cin >> cpuID;
+
+    // Search for the CPU in the HashTable
+    CPU* foundCPU = hashTable->search(cpuID);
+
+    if (foundCPU != nullptr) {
+        std::cout << "CPU found:" << std::endl;
+        std::cout << *foundCPU << std::endl;
+    } else {
+        std::cout << "CPU not found." << std::endl;
+    }
+}
\ No newline at end of file
diff --git a/SearchManager.h b/SearchManager.h
new file mode 100644
index 0000000..2198acf
--- /dev/null
+++ b/SearchManager.h
@@ -0,0 +1,19 @@
+#ifndef SEARCH_MANAGER_H
+#define SEARCH_MANAGER_H
+
+#include "HashTable.h"
+#include "CPU.h"
+
+template<typename T>
+class SearchManager {
+private:
+    HashTable* hashTable;
+
+public:
+    SearchManager(HashTable* ht);
+    ~SearchManager();
+
+    void searchCPU() const;
+};
+
+#endif
\ No newline at end of file
diff --git a/UndoManager.cpp b/UndoManager.cpp
new file mode 100644
index 0000000..218c2bb
--- /dev/null
+++ b/UndoManager.cpp
@@ -0,0 +1,37 @@
+#include "UndoManager.h"
+#include <iostream>
+
+UndoManager::UndoManager(HashTable* ht, BinarySearchTree* bst) {
+    this->hashTable = ht;
+    this->bst = bst;
+    this->undoStack = new Stack<CPU>();
+}
+
+UndoManager::~UndoManager() {
+    delete undoStack;
+}
+
+void UndoManager::addToUndoStack(const CPU& cpu) {
+    undoStack->push(cpu);
+}
+
+void UndoManager::undoDelete() {
+    if (!undoStack->isEmpty()) {
+        CPU lastDeleted = undoStack->pop();
+
+        // Reinsert the CPU into the HashTable and BST
+        hashTable->insert(lastDeleted);
+        bst->insert(lastDeleted);
+
+        std::cout << "Undo successful. CPU reinserted:" << std::endl;
+        std::cout << lastDeleted << std::endl;
+    } else {
+        std::cout << "No deletions to undo." << std::endl;
+    }
+}
+
+void UndoManager::clearUndoStack() {
+    while (!undoStack->isEmpty()) {
+        undoStack->pop();
+    }
+}
\ No newline at end of file
diff --git a/UndoManager.h b/UndoManager.h
new file mode 100644
index 0000000..6239cf3
--- /dev/null
+++ b/UndoManager.h
@@ -0,0 +1,25 @@
+#ifndef UNDO_MANAGER_H
+#define UNDO_MANAGER_H
+
+#include "HashTable.h"
+#include "BinarySearchTree.h"
+#include "Stack.h"
+#include "CPU.h"
+
+template<typename T>
+class UndoManager {
+private:
+    HashTable* hashTable;
+    BinarySearchTree* bst;
+    Stack<CPU>* undoStack;
+
+public:
+    UndoManager(HashTable* ht, BinarySearchTree* bst);
+    ~UndoManager();
+
+    void addToUndoStack(const CPU& cpu);
+    void undoDelete();
+    void clearUndoStack();
+};
+
+#endif
\ No newline at end of file