diff --git a/Practice Assignment 4/main.py b/Practice Assignment 4/main.py
new file mode 100644
index 0000000..9c48574
--- /dev/null
+++ b/Practice Assignment 4/main.py	
@@ -0,0 +1,86 @@
+import random
+import re
+import os
+
+TERMS = {
+    "ALGORITHM": "A set of instructions to solve a problem",
+    "MALWARE": "Software designed to cause harm to a system",
+    "PHISHING": "Fraudulent attempt to obtain sensitive information",
+    "SQL": "Language used to communicate with databases",
+    "ENCRYPTION": "Process of converting data to prevent unauthorized access",
+    "SERVER": "A computer that provides data to other computers",
+    "TESTING": "Checking code to ensure it meets requirements without errors"
+}
+
+def auth():
+    choice = input("Enter 'r' to register or 'l' to login: ").lower()
+    if choice == 'r':
+        name = input("Enter full name: ")
+        while True:
+            user = input("Choose username (4-8 characters): ")
+            if 4 <= len(user) <= 8: break
+            print("Username must be between 4 and 8 characters.")
+        while True:
+            pwd = input("Choose password (requires uppercase, lowercase, and a number): ")
+            if re.search(r'[A-Z]', pwd) and re.search(r'[a-z]', pwd) and re.search(r'\d', pwd): break
+            print("Password does not meet complexity requirements.")
+        
+        with open("students.txt", "a") as f: 
+            f.write(f"{user},{pwd},{name}\n")
+        return user
+    else:
+        u, p = input("Username: "), input("Password: ")
+        try:
+            with open("students.txt", "r") as f:
+                if any(line.strip().startswith(f"{u},{p},") for line in f): return u
+        except FileNotFoundError: pass
+        print("Login failed or user does not exist."); return None
+
+def quiz(user):
+    keyword, correct_def = random.choice(list(TERMS.items()))
+    options = [correct_def] + random.sample([v for k, v in TERMS.items() if k != keyword], min(3, len(TERMS)-1))
+    random.shuffle(options)
+    
+    print(f"\nKeyword: {keyword}")
+    for i, opt in enumerate(options, 1): 
+        print(f"{i}. {opt}")
+    
+    score = 0
+    for attempt, points in [(1, 3), (2, 1)]:
+        try:
+            ans = int(input(f"Attempt {attempt} - Choose 1-{len(options)}: "))
+            if options[ans-1] == correct_def:
+                print("Correct!")
+                score = points
+                break
+            print("Incorrect!")
+        except (ValueError, IndexError): 
+            print("Invalid choice.")
+    else:
+        print(f"The correct definition was: {correct_def}")
+        
+    with open("scores.txt", "a") as f: 
+        f.write(f"{user},{score}\n")
+
+def main():
+    user = None
+    while not user: 
+        user = auth()
+        
+    while True:
+        action = input("\nChoose: [1] Try Quiz [2] View Scores [3] Quit: ")
+        if action == '1': 
+            quiz(user)
+        elif action == '2':
+            try:
+                with open("scores.txt", "r") as f:
+                    scores = [l.strip().split(',')[1] for l in f if l.startswith(f"{user},")]
+                    print("Your previous scores:" if scores else "No scores yet.")
+                    for s in scores: print(f"- {s} points")
+            except FileNotFoundError: 
+                print("No scores yet.")
+        elif action == '3': 
+            break
+
+if __name__ == "__main__": 
+    main()
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diff --git a/Practice Assignment 5/main.py b/Practice Assignment 5/main.py
new file mode 100644
index 0000000..e69de29