diff --git a/subjects/atm-management-system/README.md b/subjects/atm-management-system/README.md
new file mode 100644
index 00000000..8b72b657
--- /dev/null
+++ b/subjects/atm-management-system/README.md
@@ -0,0 +1,133 @@
+## ATM
+
+### Objective
+
+The objective for this project is to show that you have acquired programming logic and that you are able to adapt to new languages.
+
+The programming language you are about to use is [C](https://en.wikipedia.org/wiki/C_%28programming_language%29). It will not be asked to create
+a project from scratch, insted you will have **to add features or fix the code of a given application**.
+
+### Instructions
+
+You will be provided with an ATM management system where users can do the following actions:
+
+- Login/Register
+- Create a new account
+- Check the details of existing accounts
+- Update information of existing accounts
+- Remove existing accounts
+- Check list of owned accounts
+- Make transactions
+
+> The application provided will just handle the **login**, the **creation of new accounts** and **checking the list of owned accounts**. The rest of the features must
+be implemented by yourself.
+
+### File System
+
+A folder which you can find [here](https://downgit.github.io/#/home?url=https://github.com/01-edu/public/tree/master/subjects/atm-management-system/atm-system/) is provided, this folder will have the following `fs`(file system):
+
+```console
+.
+|
+├── data
+│   ├── records.txt
+│   └── users.txt
+├── Makefile
+├── README.md
+└── src
+    ├── auth.c
+    ├── header.h
+    ├── main.c
+    └── system.c
+```
+
+The `data` folder presented above will contain information about the users and their accounts:
+
+- `users.txt` will be the a file that stores all information about each user
+- `records.txt` will be the a file that stores all information relevant to the accounts for each user
+
+The format for the content saved in the file will be displayed like this :
+
+`users.txt` (name, password):
+
+```console
+Alice 1234password
+Michel password1234
+....
+```
+
+`records.txt` (user name, account id, date of creation, country, phone nº, type of account) :
+
+```console
+Alice 0 10/02/2020 german 986134231 11090830.00 current
+Michel 2 10/10/2021 portugal 914134431 1920.42 savings
+Alice 1 10/10/2000 finland 986134231 1234.21 savings
+....
+```
+
+### Features
+
+The following features must be implemented by yourself.
+
+1. The **Registration** feature, you must be able to register new users, users with the same name can not exist (names must be unique). They must be saved in the right file.
+
+2. The **Update information of existing account** feature, users must be able to update their country or phone number.
+
+   2.1. You must ask users to input the account `id` they want to change, followed by a prompt asking which field they want to also change (the only fields that are permitted to update is the phone number and the country).
+
+   2.2. Whenever users update an account, it must be saved into the corresponding file.
+
+3. The **Checking the details of existing accounts** feature, users must be able to check just one account at a time.
+
+   3.1. For this it must be asked to input the account id they want to see
+
+   3.2. If the account is either `savings`, `fixed01`, `fixed02` and `fixed03` the system will display
+   the information of that account and the interest you will acquire depending on the account:
+
+   - savings: interest rate 0.07%
+   - fixed01(1 year account): interest rate 0.04%
+   - fixed02(2 year account): interest rate 0.05%
+   - fixed03(3 year account): interest rate 0.08%
+   - If the account is current you must display `You will not get interests because the account is of type current`
+
+4. The **Make transaction** feature, users must be able to create transactions, withdrawing or depositing money to a certain account. All transactions
+   must be updated and saved into the corresponding file.
+
+5. The **Remove existing account** feature, users must be able to delete their own account, the same must happen here, updates must be saved into the corresponding file.
+
+6. The **Transfer owner** feature, users can transfer their account to another user, by:
+
+   6.1. Identifying the account and the user they want to transfer the ownership to
+
+   6.2. Saving the information in the corresponding file
+
+### Bonus
+
+As bonus you can add a verification to the field **Transfer owner**. Every time a user transfers ownership of an account the other user who received the account
+can be alerted that he or she received an account from someone instantly.
+Example: if you have two terminals opened logged with two different users, and one send the account to the other user,
+the user who received the account should be instantly notified.
+One of the ways of doing this is by using pipes and child processes (communication between processes).
+
+You can also do more bonus features or update the terminal interface:
+
+- Better terminal interface (TUI)
+- Encryption of passwords 
+- Adding your own Makefile
+
+### Example
+
+You can find an example of the final application [here](https://www.youtube.com/watch?v=xVtikDcGG2E). Do not forget that you are free to
+implement whichever kind of interface you desire. It just needs to obey the instructions given above so it can pass the audit.
+
+This project will help you learn about:
+
+- [C](https://en.wikipedia.org/wiki/C_%28programming_language%29) language
+  - Language Fundamentals
+- Data manipulation
+  - File manipulation
+  - Data structures
+- Makefile
+- Terminal UI
+- Memory management
+- Pipes and child processes
diff --git a/subjects/atm-management-system/atm_system/Makefile b/subjects/atm-management-system/atm_system/Makefile
new file mode 100644
index 00000000..62befd2c
--- /dev/null
+++ b/subjects/atm-management-system/atm_system/Makefile
@@ -0,0 +1,16 @@
+objects = src/main.o src/system.o src/auth.o
+
+atm : $(objects)
+	cc -o atm $(objects)
+
+main.o : src/header.h
+kbd.o : src/header.h
+command.o : src/header.h
+display.o : src/header.h
+insert.o : src/header.h
+search.o : src/header.h
+files.o : src/header.h
+utils.o : src/header.h
+
+clean :
+	rm -f $(objects)
diff --git a/subjects/atm-management-system/atm_system/data/records.txt b/subjects/atm-management-system/atm_system/data/records.txt
new file mode 100644
index 00000000..b9d75f71
--- /dev/null
+++ b/subjects/atm-management-system/atm_system/data/records.txt
@@ -0,0 +1,6 @@
+Alice 0 10/10/2012 Africa 291321234 22432.52 saving
+
+Michel 2 2/5/2001 Portugal 123543455 10023.230000 fixed01
+
+Michel 123 10/10/2020 UK 1234123 12345.30 saving
+
diff --git a/subjects/atm-management-system/atm_system/data/users.txt b/subjects/atm-management-system/atm_system/data/users.txt
new file mode 100644
index 00000000..00694cf8
--- /dev/null
+++ b/subjects/atm-management-system/atm_system/data/users.txt
@@ -0,0 +1,2 @@
+Alice q1w2e3r4t5y6
+Michel q1w2e3r4t5y6
diff --git a/subjects/atm-management-system/atm_system/src/auth.c b/subjects/atm-management-system/atm_system/src/auth.c
new file mode 100644
index 00000000..c3e61b08
--- /dev/null
+++ b/subjects/atm-management-system/atm_system/src/auth.c
@@ -0,0 +1,59 @@
+#include <termios.h>
+#include "header.h"
+
+char *USERS = "./data/users.txt";
+
+void loginMenu(char a[50], char pass[50])
+{
+    struct termios oflags, nflags;
+
+    system("clear");
+    printf("\n\n\n\t\t\t\t   Bank Management System\n\t\t\t\t\t User Login:");
+    scanf("%s", a);
+
+    // disabling echo
+    tcgetattr(fileno(stdin), &oflags);
+    nflags = oflags;
+    nflags.c_lflag &= ~ECHO;
+    nflags.c_lflag |= ECHONL;
+
+    if (tcsetattr(fileno(stdin), TCSANOW, &nflags) != 0)
+    {
+        perror("tcsetattr");
+        return exit(1);
+    }
+    printf("\n\n\n\n\n\t\t\t\tEnter the password to login:");
+    scanf("%s", pass);
+
+    // restore terminal
+    if (tcsetattr(fileno(stdin), TCSANOW, &oflags) != 0)
+    {
+        perror("tcsetattr");
+        return exit(1);
+    }
+};
+
+const char *getPassword(struct User u)
+{
+    FILE *fp;
+    struct User userChecker;
+
+    if ((fp = fopen("./data/users.txt", "r")) == NULL)
+    {
+        printf("Error! opening file");
+        exit(1);
+    }
+
+    while (fscanf(fp, "%s %s", userChecker.name, userChecker.password) != EOF)
+    {
+        if (strcmp(userChecker.name, u.name) == 0)
+        {
+            fclose(fp);
+            char *buff = userChecker.password;
+            return buff;
+        }
+    }
+
+    fclose(fp);
+    return "no user found";
+}
\ No newline at end of file
diff --git a/subjects/atm-management-system/atm_system/src/header.h b/subjects/atm-management-system/atm_system/src/header.h
new file mode 100644
index 00000000..61d7971a
--- /dev/null
+++ b/subjects/atm-management-system/atm_system/src/header.h
@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct Date
+{
+    int month, day, year;
+};
+
+// all fields for each record of an account
+struct Record
+{
+    char name[100];
+    char country[100];
+    int phone;
+    char accountType[10];
+    int accountNbr;
+    double amount;
+    struct Date deposit;
+    struct Date withdraw;
+};
+
+struct User
+{
+    char name[50];
+    char password[50];
+};
+
+// authentication functions
+void loginMenu(char a[50], char pass[50]);
+void registerMenu(char a[50], char pass[50]);
+const char *getPassword(struct User u);
+
+// system function
+void createNewAcc(struct User u);
+void mainMenu(struct User u);
+void checkAllAccounts(struct User u);
diff --git a/subjects/atm-management-system/atm_system/src/main.c b/subjects/atm-management-system/atm_system/src/main.c
new file mode 100644
index 00000000..9829a876
--- /dev/null
+++ b/subjects/atm-management-system/atm_system/src/main.c
@@ -0,0 +1,104 @@
+#include "header.h"
+
+void mainMenu(struct User u)
+{
+    int option;
+    system("clear");
+    printf("\n\n\t\t======= ATM =======\n\n");
+    printf("\n\t\t-->> Feel free to choose one of the options below <<--\n");
+    printf("\n\t\t[1]- Create a new account\n");
+    printf("\n\t\t[2]- Update information of account\n");
+    printf("\n\t\t[3]- Check accounts\n");
+    printf("\n\t\t[4]- Check list of owned account\n");
+    printf("\n\t\t[5]- Make Transaction\n");
+    printf("\n\t\t[6]- Remove existing account\n");
+    printf("\n\t\t[7]- Transfer ownership\n");
+    printf("\n\t\t[8]- Exit\n");
+    scanf("%d", &option);
+
+    switch (option)
+    {
+    case 1:
+        createNewAcc(u);
+        break;
+    case 2:
+        // student TODO : add your **Update information of existing account** function
+        // here
+        break;
+    case 3:
+        // student TODO : add your **Check the details of existing accounts** function
+        // here
+        break;
+    case 4:
+        checkAllAccounts(u);
+        break;
+    case 5:
+        // student TODO : add your **Make transaction** function
+        // here
+        break;
+    case 6:
+        // student TODO : add your **Remove existing account** function
+        // here
+        break;
+    case 7:
+        // student TODO : add your **Transfer owner** function
+        // here
+        break;
+    case 8:
+        exit(1);
+        break;
+    default:
+        printf("Invalid operation!\n");
+    }
+};
+
+void initMenu(struct User *u)
+{
+    int r = 0;
+    int option;
+    system("clear");
+    printf("\n\n\t\t======= ATM =======\n");
+    printf("\n\t\t-->> Feel free to login / register :\n");
+    printf("\n\t\t[1]- login\n");
+    printf("\n\t\t[2]- register\n");
+    printf("\n\t\t[3]- exit\n");
+    while (!r)
+    {
+        scanf("%d", &option);
+        switch (option)
+        {
+        case 1:
+            loginMenu(u->name, u->password);
+            if (strcmp(u->password, getPassword(*u)) == 0)
+            {
+                printf("\n\nPassword Match!");
+            }
+            else
+            {
+                printf("\nWrong password!! or User Name\n");
+                exit(1);
+            }
+            r = 1;
+            break;
+        case 2:
+            // student TODO : add your **Registration** function
+            // here
+            r = 1;
+            break;
+        case 3:
+            exit(1);
+            break;
+        default:
+            printf("Insert a valid operation!\n");
+        }
+    }
+};
+
+int main()
+{
+    struct User u;
+    
+    initMenu(&u);
+    mainMenu(u);
+    return 0;
+}
diff --git a/subjects/atm-management-system/atm_system/src/system.c b/subjects/atm-management-system/atm_system/src/system.c
new file mode 100644
index 00000000..1a5f03c9
--- /dev/null
+++ b/subjects/atm-management-system/atm_system/src/system.c
@@ -0,0 +1,161 @@
+#include "header.h"
+
+const char *RECORDS = "./data/records.txt";
+
+int getAccountFromFile(FILE *ptr, char name[50], struct Record *r)
+{
+    return fscanf(ptr, "%s %d %d/%d/%d %s %d %lf %s",
+                  name,
+                  &r->accountNbr,
+                  &r->deposit.month,
+                  &r->deposit.day,
+                  &r->deposit.year,
+                  r->country,
+                  &r->phone,
+                  &r->amount,
+                  r->accountType) != EOF;
+}
+
+void saveAccountToFile(FILE *ptr, char name[50], struct Record r)
+{
+    fprintf(ptr, "%s %d %d/%d/%d %s %d %.2lf %s\n\n",
+            name,
+            r.accountNbr,
+            r.deposit.month,
+            r.deposit.day,
+            r.deposit.year,
+            r.country,
+            r.phone,
+            r.amount,
+            r.accountType);
+}
+
+void stayOrReturn(int notGood, void f(struct User u), struct User u)
+{
+    int option;
+    if (notGood == 0)
+    {
+        system("clear");
+        printf("\n✖ Record not found!!\n");
+    invalid:
+        printf("\nEnter 0 to try again, 1 to return to main menu and 2 to exit:");
+        scanf("%d", &option);
+        if (option == 0)
+            f(u);
+        else if (option == 1)
+            mainMenu(u);
+        else if (option == 2)
+            exit(0);
+        else
+        {
+            printf("Insert a valid operation!\n");
+            goto invalid;
+        }
+    }
+    else
+    {
+        printf("\nEnter 1 to go to the main menu and 0 to exit:");
+        scanf("%d", &option);
+    }
+    if (option == 1)
+    {
+        system("clear");
+        mainMenu(u);
+    }
+    else
+    {
+        system("clear");
+        exit(1);
+    }
+}
+
+void success(struct User u)
+{
+    int option;
+    printf("\n✔ Success!\n\n");
+invalid:
+    printf("Enter 1 to go to the main menu and 0 to exit!\n");
+    scanf("%d", &option);
+    system("clear");
+    if (option == 1)
+    {
+        mainMenu(u);
+    }
+    else if (option == 0)
+    {
+        exit(1);
+    }
+    else
+    {
+        printf("Insert a valid operation!\n");
+        goto invalid;
+    }
+}
+
+void createNewAcc(struct User u)
+{
+    struct Record r;
+    struct Record cr;
+    char userName[50];
+    FILE *pf = fopen(RECORDS, "a+");
+
+noAccount:
+    system("clear");
+    printf("\t\t\t===== New record =====\n");
+
+    printf("\nEnter today's date(mm/dd/yyyy):");
+    scanf("%d/%d/%d", &r.deposit.month, &r.deposit.day, &r.deposit.year);
+    printf("\nEnter the account number:");
+    scanf("%d", &r.accountNbr);
+
+    while (getAccountFromFile(pf, userName, &cr))
+    {
+        if (strcmp(userName, u.name) == 0 && cr.accountNbr == r.accountNbr)
+        {
+            printf("✖ This Account already exists for this user\n\n");
+            goto noAccount;
+        }
+    }
+    printf("\nEnter the country:");
+    scanf("%s", r.country);
+    printf("\nEnter the phone number:");
+    scanf("%d", &r.phone);
+    printf("\nEnter amount to deposit: $");
+    scanf("%lf", &r.amount);
+    printf("\nChoose the type of account:\n\t-> saving\n\t-> current\n\t-> fixed01(for 1 year)\n\t-> fixed02(for 2 years)\n\t-> fixed03(for 3 years)\n\n\tEnter your choice:");
+    scanf("%s", r.accountType);
+
+    saveAccountToFile(pf, u.name, r);
+
+    fclose(pf);
+    success(u);
+}
+
+void checkAllAccounts(struct User u)
+{
+    char userName[100];
+    struct Record r;
+
+    FILE *pf = fopen(RECORDS, "r");
+
+    system("clear");
+    printf("\t\t====== All accounts from user, %s =====\n\n", u.name);
+    while (getAccountFromFile(pf, userName, &r))
+    {
+        if (strcmp(userName, u.name) == 0)
+        {
+            printf("_____________________\n");
+            printf("\nAccount number:%d\nDeposit Date:%d/%d/%d \ncountry:%s \nPhone number:%d \nAmount deposited: $%.2f \nType Of Account:%s\n",
+                   r.accountNbr,
+                   r.deposit.day,
+                   r.deposit.month,
+                   r.deposit.year,
+                   r.country,
+                   r.phone,
+                   r.amount,
+                   r.accountType);
+        }
+    }
+    fclose(pf);
+    success(u);
+}
diff --git a/subjects/atm-management-system/audit/README.md b/subjects/atm-management-system/audit/README.md
new file mode 100644
index 00000000..db5ebf7e
--- /dev/null
+++ b/subjects/atm-management-system/audit/README.md
@@ -0,0 +1,95 @@
+#### Functional
+
+##### Open the application and register a new user with the name `"Alice"` and the password `"q1w2e3r4t5y6"`
+
+###### Is this user saved in the file `"./data/users.txt"`, and if so are all credentials correct (name and password)?
+
+##### Open the application and register again the user `"Alice"`.
+
+###### Did it displayed an error message saying that this user already exists?
+
+##### Open the file `"./data/users.txt"`.
+
+###### Are all the user names unique? (ex: no repetition on the name Alice)
+
+##### Try and login as `"Alice"`.
+
+###### Was Alice able to enter the main menu?
+
+##### Try to create two accounts using the user Alice, then select the option `"Update information of account"` and select an account number that does not exist for Alice.
+
+###### Did the application displayed some kind of error message saying that this account does not exist?
+
+##### Resorting to the user Alice try and select the option `"Update information of account"` and select one of the accounts you created for Alice.
+
+###### Did the the application prompt a choice of updating the **phone number** or the **country**?
+
+##### Resorting to the user Alice try and select the option `"Update information of account"` and select one of the accounts you created for Alice. Then update the phone number of that account.
+
+###### Was the phone number of that account updated in the application and the file `"records.txt"`?
+
+##### Resorting to the user Alice try and select the option `"Update information of account"` and select one of the accounts you created for Alice. Then update the country of that account.
+
+###### Was the country of that account updated in the application and the file `"records.txt"`?
+
+##### Resorting to the user Alice try to create a new account with: date `"10/10/2012"` account number `"834213"`, country `"UK"`, phone number `"291231392"`, deposit amount  $`"1001.20"`, type of account `"saving"`. Then select `"Check accounts"` choose the account you just created.
+
+###### Did the application displayed the account information and the gain of $5.84 of interest on day 10 of every moth?
+
+##### Resorting to the user Alice create again an account but with account number "320421" and type of account "fixed01" with the rest of the information as in the last account . Then select `"Check accounts"` and choose the account you just created.
+
+###### Did the application displayed the account information and the gain of $40.05 of interest on 10/10/2013?
+
+##### Resorting to the user Alice create again an account but with account number `"3214"` and type of account `"fixed02"` with the rest of the information as in the last account. Then select `"Check accounts"` and choose the account you just created.
+
+###### Did the application displayed the account information and the gain of $100.12 of interest on 10/10/2014?
+
+##### Resorting to the user Alice create again an account but with account number `"3212"` and type of account `"fixed03"` with the rest of the information as in the last account. Then select `"Check accounts"` and choose the account you just created.
+
+###### Did the application displayed the account information and the gain of $240.29 of interest on 10/10/2015?
+
+##### Resorting to the user Alice select the option `"Make transaction"`. Then choose the account with the id `"3212"`
+
+###### Are you able to choose between withdrawing or depositing?
+
+##### Resorting to the user Alice select the option `"Make transaction"`, choose the account with the id `"3212"`. Then try to withdraw money.
+
+###### Are you able to withdraw money?
+
+###### And if so, was the withdraw updated in the file `"records.txt"`?
+
+###### Is it not possible to withdraw an amount superior to your available balance?
+
+##### Try to deposit money into the account `"3212"`.
+
+###### Were you able to deposit money into this account?
+
+###### And if so did it update the file `"records.txt"`?
+
+##### Resorting to the user Alice try to select the option `"Remove existing account"` and remove the accounts `"834213"`, `"320421"` and `"3214"`.
+
+###### Can you confirm that those account were deleted, both in the application and file `"records.txt"`?
+
+##### Resorting to the user Alice select the option `"Remove existing account"` and try to remove and nonexisting account.
+
+###### Did the application prompt some type of error saying that the account does not exists?
+
+##### Create another user named `"Michel"`. Then by using Alice select the option `"transfer owner"` and try to transfer ownership of the account `"3212"` to Michel.
+
+###### Were you able to transfer the ownership of this account to Michel? And if so did it update both application and file `"records.txt"`?
+
+#### Bonus
+
+##### Open two terminals and login with two different users. Then transfer ownership of an account to the other user.
+
+###### +Was the user whom received the account notified instantly?
+
+###### +Did the student update the terminal interface?
+
+###### +Is the password saved in the file `"users.txt"` encrypted?
+
+###### +Did the student make their own Makefile?
+
+###### +Did the student add more features to the project?
+
+###### +Did the student optimise the code already given?
\ No newline at end of file