diff --git a/csci/fib.js b/csci/fib.js
new file mode 100644
index 0000000..51b7623
--- /dev/null
+++ b/csci/fib.js
@@ -0,0 +1,39 @@
+function loopFib(seq) {
+  let first = 0;
+  let second = 1;
+  let final = [];
+
+  if (seq < 1) return first;
+
+  for (let i = 1; i < seq; i++) {
+    if (first === 0) {
+      final.push(first);
+      first = 1;
+    } else {
+      let temp = second;
+      second = first + second;
+      first = temp;
+    }
+    final.push(first);
+  }
+
+  console.log(final);
+}
+
+function recursiveFib(seq) {
+  if (seq === 1) {
+    return [0];
+  } else if (seq === 2) {
+    // if (seq < 2) {
+    return [0, 1];
+  } else {
+    let arr = recursiveFib(seq - 1);
+    arr.push(arr[arr.length - 1] + arr[arr.length - 2]);
+    return arr;
+  }
+}
+
+let num = process.argv[2];
+
+loopFib(num);
+console.log(recursiveFib(num));
diff --git a/csci/mergeSort.js b/csci/mergeSort.js
new file mode 100644
index 0000000..2c1b8ba
--- /dev/null
+++ b/csci/mergeSort.js
@@ -0,0 +1,33 @@
+function mergeSort(arr) {
+  if (arr.length <= 1) {
+    return arr;
+  } else {
+    let half = Math.round(arr.length / 2);
+    let leftSide = mergeSort(arr.slice(0, half));
+    let rightSide = mergeSort(arr.slice(half, arr.length));
+
+    let newArr = mergeArray(leftSide, rightSide);
+
+    return newArr;
+  }
+}
+
+function mergeArray(left, right) {
+  let sorted = [];
+
+  while (left.length && right.length) {
+    if (left[0] < right[0]) {
+      sorted.push(left.shift());
+    } else {
+      sorted.push(right.shift());
+    }
+  }
+  return sorted.concat(left, right);
+}
+let testCaseOne = [2, 1, 3, 9, 4, 5, 23, 10];
+
+let testCaseTWo = [23, 5, 3, 1, 8, 7, 2, 4];
+console.log(`Test Case No1: ${testCaseOne}`);
+console.log(mergeSort(testCaseOne));
+console.log(`Test Case No2: ${testCaseTWo}`);
+console.log(mergeSort(testCaseTWo));