diff --git a/.gitmodules b/.gitmodules
index fdbbb12..6e4da16 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "cs4212/week-01-simple-2025"]
 	path = cs4212/week-01-simple-2025
 	url = https://github.com/cs4212/week-01-simple-2025
+[submodule "cs4212/hw1-hellocaml-yadunut"]
+	path = cs4212/hw1-hellocaml-yadunut
+	url = https://github.com/cs4212/hw1-hellocaml-yadunut
diff --git a/cs3223/main.typ b/cs3223/main.typ
new file mode 100644
index 0000000..84396e2
--- /dev/null
+++ b/cs3223/main.typ
@@ -0,0 +1,12 @@
+#import "@preview/ilm:1.4.1": *
+
+
+#show: ilm.with(
+  title: [],
+  author: "Yadunand Prem",
+  table-of-contents: none,
+)
+#set text(lang: "en", font: ("SF Pro Condensed"))
+#show raw: set text(font: "SF Mono")
+
+== Reference
diff --git a/cs3231/main.pdf b/cs3231/main.pdf
new file mode 100644
index 0000000..75dd622
Binary files /dev/null and b/cs3231/main.pdf differ
diff --git a/cs3231/main.typ b/cs3231/main.typ
new file mode 100644
index 0000000..13562e1
--- /dev/null
+++ b/cs3231/main.typ
@@ -0,0 +1,32 @@
+#import "@preview/ilm:1.4.1": *
+
+
+#show: ilm.with(
+  title: [CS3231  - The Theory of Computing],
+  author: "Yadunand Prem",
+  // bibliography: bibliography("refs.bib"),
+  table-of-contents: none,
+  // figure-index: (enabled: true),
+  // table-index: (enabled: true),
+  // listing-index: (enabled: true),
+)
+#set text(lang: "en", font: ("SF Pro Condensed"))
+#show raw: set text(font: "SF Mono")
+
+== Reference
+- Alphabet - Finite Non empty set of symbols, denoted by $Sigma$
+  - Powers of Alphabet
+    - $Sigma^2 = {00, 01, 10, 11}$
+    - $Sigma^0 = {epsilon.alt}$
+    - $Sigma^ lt.eq 2 = Sigma^0 union Sigma^1 union Sigma^2$
+- String - Sequence of Symbols from $Sigma$, denoted by $epsilon.alt$
+  - Concat - $x = 00, y = 10, x dot y = x y = 0010$
+  - Substring - $a b$ is a substring of $b a b a a$, $b b$ is not.
+  - Subsequence - $b b a$ is not subseq of $b a b a a $, $a b b$ is
+- Length of String - Number of symbols in a string, denoted by $|w|$
+- Language - Set of strings over an alphabet
+  - $L = {00, 11, 01, 110}$
+  - $L = emptyset$
+  - $L_1 dot L_2 = L_1L_2 = {x y : x in L_1, y in L_2}$
+  - $L^* = {x_1x_2...x_n : x_1, x_2, ... x_n in L, n in NN}$
+  - $L^+ = {x_1x_2...x_n : x_1, x_2, ... x_n in L, n gt.eq 1}$
diff --git a/cs4212/hw1-hellocaml-yadunut b/cs4212/hw1-hellocaml-yadunut
new file mode 160000
index 0000000..0c846f8
--- /dev/null
+++ b/cs4212/hw1-hellocaml-yadunut
@@ -0,0 +1 @@
+Subproject commit 0c846f83f70f18eb31173aaf2cdf2f032efc1a97
diff --git a/cs4212/main.typ b/cs4212/main.typ
new file mode 100644
index 0000000..feb47c2
--- /dev/null
+++ b/cs4212/main.typ
@@ -0,0 +1,12 @@
+#import "@preview/ilm:1.4.1": *
+
+
+#show: ilm.with(
+  title: [CS4212  - Compilers],
+  author: "Yadunand Prem",
+  table-of-contents: none,
+)
+#set text(lang: "en", font: ("SF Pro Condensed"))
+#show raw: set text(font: "SF Mono")
+
+== Reference
diff --git a/sample.typ b/sample.typ
new file mode 100644
index 0000000..84396e2
--- /dev/null
+++ b/sample.typ
@@ -0,0 +1,12 @@
+#import "@preview/ilm:1.4.1": *
+
+
+#show: ilm.with(
+  title: [],
+  author: "Yadunand Prem",
+  table-of-contents: none,
+)
+#set text(lang: "en", font: ("SF Pro Condensed"))
+#show raw: set text(font: "SF Mono")
+
+== Reference