diff --git a/Codes/FCFS.py b/Codes/FCFS.py
new file mode 100755
index 0000000..a39a4d6
--- /dev/null
+++ b/Codes/FCFS.py
@@ -0,0 +1,65 @@
+'''
+Every process is an obj with it's own wt,bt,at etc. 
+the table is an obj of table class. 
+Our table is just a list of process objects
+wt,tat,ct are calculated by waitCalculator()
+createTable() displays table neatly
+'''
+
+
+
+
+class ProcessClass:
+    def __init__(self):                             #constructor in Py
+        self.name =input("Enter Process Name: ")
+        self.at = int(input("Enter Arrival Time: "))
+        self.bt = int(input("Enter Burst Time: "))
+        self.wt = 0
+        self.tat = 0
+        self.ct = 0
+    def display(self):
+        print(f"{self.name}:\t{self.at}\t{self.bt}\t{self.wt}\t{self.ct}\t\t{self.tat}\n")
+
+class Table_class:
+    
+    def __init__(self):
+        self.table = []
+        self.table1 = []
+        print("Enter Processes:\n")
+        while True:
+            ch = int(input("\n\nAdd a new process?\t"))
+            if ch:
+                p =  ProcessClass()
+                self.table.append(p)
+            else: break
+    def fcfs(self):
+        time = 0
+        self.table1 = sorted(self.table, key= lambda p: p.at)              #sorts array based on arrival time
+        for cp in self.table1:
+            cp.ct = cp.bt + time
+            cp.wt = time - cp.at
+            cp.tat = cp.wt + cp.bt
+            time+= cp.bt
+    def createTable(self):
+        print(f"\n\nThe Table is:")
+        print(f"Process\tArrival\tBurst\tWaiting\tCompletedAt\tT.A.T\n")
+        for p in self.table1:
+            p.display()
+
+    def sjf(self):
+        time = 0
+        self.table1 = sorted(self.table,key= lambda p: p.bt)              #sorts array based on arrival time
+        for cp in self.table1:
+            cp.ct = cp.bt + time
+            if time:
+                cp.wt = time - cp.at
+            else:
+               cp.wt = 0
+            cp.tat = cp.wt + cp.bt
+            time+= cp.bt
+        
+# Code by Afan Shaikh.
+tab = Table_class()
+print("Using sjf!!\n\n")
+tab.sjf()
+tab.createTable()
\ No newline at end of file
diff --git a/Codes/Pri_SJF.doc b/Codes/Pri_SJF.doc
new file mode 100644
index 0000000..1a7e90d
Binary files /dev/null and b/Codes/Pri_SJF.doc differ
diff --git a/Codes/RR.cpp b/Codes/RR.cpp
new file mode 100755
index 0000000..df2cda5
--- /dev/null
+++ b/Codes/RR.cpp
@@ -0,0 +1,67 @@
+#include <iostream>
+#include <queue>
+#include <vector>
+
+using namespace std;
+
+struct Process {
+    int id;
+    int burstTime;
+    int remainingTime;
+    int waitingTime;
+    int turnaroundTime;
+};
+
+void roundRobinScheduling(vector<Process> &processes, int quantum) {
+    int n = processes.size();
+    queue<int> readyQueue;  
+    vector<int> completionTimes(n, 0); 
+
+    int currentTime = 0;
+
+    for (int i = 0; i < n; ++i) {
+        readyQueue.push(i);
+        processes[i].remainingTime = processes[i].burstTime;
+    }
+
+    while (!readyQueue.empty()) {
+        int currentProcessId = readyQueue.front();
+        readyQueue.pop();
+        
+        if (processes[currentProcessId].remainingTime <= quantum) {
+            currentTime += processes[currentProcessId].remainingTime;
+            processes[currentProcessId].remainingTime = 0;
+            processes[currentProcessId].turnaroundTime = currentTime;
+            processes[currentProcessId].waitingTime = processes[currentProcessId].turnaroundTime - processes[currentProcessId].burstTime;
+            completionTimes[currentProcessId] = currentTime;
+        } else {
+            currentTime += quantum;
+            processes[currentProcessId].remainingTime -= quantum;
+            readyQueue.push(currentProcessId);  
+        }
+    }
+
+    
+    cout<<"Time Quantum = 4";
+    cout << "Process ID\tBurst Time\tWaiting Time\tTurnaround Time\n";
+    for (int i = 0; i < n; ++i) {
+        cout << processes[i].id << "\t\t" << processes[i].burstTime << "\t\t" << processes[i].waitingTime 
+             << "\t\t" << processes[i].turnaroundTime << '\n';
+    }
+}
+
+int main() {
+    vector<Process> processes = {
+        {1, 6, 0, 0, 0},
+        {2, 8, 0, 0, 0},
+        {3, 7, 0, 0, 0},
+        {4, 3, 0, 0, 0}
+    };
+    
+    int timeQuantum = 4; 
+
+    roundRobinScheduling(processes, timeQuantum);
+
+    return 0;
+}
+
diff --git a/Codes/priority.cpp b/Codes/priority.cpp
new file mode 100755
index 0000000..a961144
--- /dev/null
+++ b/Codes/priority.cpp
@@ -0,0 +1,53 @@
+#include <iostream>
+#include <vector>
+#include <algorithm>
+
+using namespace std;
+
+struct Process {
+    int id;
+    int burstTime;
+    int priority;
+    int waitingTime;
+    int turnaroundTime;
+};
+
+bool comparePriority(Process a, Process b) {
+    return a.priority > b.priority;
+}
+
+void priorityScheduling(vector<Process> &processes) {
+    int n = processes.size();
+    
+    sort(processes.begin(), processes.end(), comparePriority);
+
+    processes[0].waitingTime = 0;
+    processes[0].turnaroundTime = processes[0].burstTime;
+for (int i = 1; i < n; ++i) {
+        processes[i].waitingTime = 0;
+        for (int j = 0; j < i; ++j) {
+            processes[i].waitingTime += processes[j].burstTime;
+        }
+        processes[i].turnaroundTime = processes[i].waitingTime + processes[i].burstTime;
+    }
+    
+    cout << "Process ID\tBurst Time\tPriority\tWaiting Time\tTurnaround Time\n";
+    for (const auto &p : processes) {
+        cout << p.id << "\t\t" << p.burstTime << "\t\t" << p.priority
+             << "\t\t" << p.waitingTime << "\t\t" << p.turnaroundTime << '\n';
+    }
+}
+
+int main() {
+    vector<Process> processes = {
+        {1, 6, 2, 0, 0},
+        {2, 8, 1, 0, 0},
+        {3, 7, 3, 0, 0},
+        {4, 3, 4, 0, 0}
+    };
+    
+    priorityScheduling(processes);
+
+    return 0;
+}
+