diff --git a/__std/misc/src/bin/array_test.rs b/__std/misc/src/bin/array_test.rs
new file mode 100644
index 0000000..f99b708
--- /dev/null
+++ b/__std/misc/src/bin/array_test.rs
@@ -0,0 +1,8 @@
+fn main() {
+    let arr = [1, 2, 3, 4, 5];
+    println!("{:?}", arr);
+    println!("First value: {}", arr[0]);
+    println!("Last value: {}", arr[arr.len() - 1]);
+    let sum = arr.into_iter().reduce(|a, b| a + b);
+    println!("Sum: {:?}", sum);
+}
\ No newline at end of file
diff --git a/__std/misc/src/bin/conditional_test.rs b/__std/misc/src/bin/conditional_test.rs
new file mode 100644
index 0000000..9a464e1
--- /dev/null
+++ b/__std/misc/src/bin/conditional_test.rs
@@ -0,0 +1,13 @@
+#[cfg(target_os = "macos")]
+fn get_os() -> &'static str {
+    "macos"
+}
+
+#[cfg(not(target_os = "macos"))]
+fn get_os() -> &'static str {
+    "unknown"
+}
+
+fn main() {
+    println!("OS: {}", get_os());
+}
\ No newline at end of file
diff --git a/__std/misc/src/bin/drop_test.rs b/__std/misc/src/bin/drop_test.rs
new file mode 100644
index 0000000..692bfaf
--- /dev/null
+++ b/__std/misc/src/bin/drop_test.rs
@@ -0,0 +1,17 @@
+#[derive(Debug)]
+struct Object {}
+
+impl Drop for Object {
+    fn drop(&mut self) {
+        println!("Object#drop");
+    }
+}
+
+fn main() {
+    {
+        let object = Object {};
+        println!("Dump: {:?}", object);
+        println!("Block end.");
+    }
+    println!("Main end.");
+}
\ No newline at end of file
diff --git a/__std/misc/src/bin/move_test.rs b/__std/misc/src/bin/move_test.rs
new file mode 100644
index 0000000..eb94c78
--- /dev/null
+++ b/__std/misc/src/bin/move_test.rs
@@ -0,0 +1,10 @@
+fn print_name(name: String) {
+    println!("Name: {}", name);
+}
+
+fn main() {
+    let name = String::from("Hatter");
+    print_name(name);
+    let name_ref = &name;
+    println!("Name: {}", name_ref);
+}
\ No newline at end of file
diff --git a/__std/misc/src/bin/string_substring_test.rs b/__std/misc/src/bin/string_substring_test.rs
new file mode 100644
index 0000000..c1abff9
--- /dev/null
+++ b/__std/misc/src/bin/string_substring_test.rs
@@ -0,0 +1,4 @@
+fn main() {
+    let s = "中国";
+    println!("{}", &s[0..2]);
+}
\ No newline at end of file
diff --git a/__std/misc/src/bin/string_test.rs b/__std/misc/src/bin/string_test.rs
new file mode 100644
index 0000000..5469ba4
--- /dev/null
+++ b/__std/misc/src/bin/string_test.rs
@@ -0,0 +1,10 @@
+// https://utf8everywhere.org/
+fn main() {
+    let s1 = "hello";
+    let s2 = "中国";
+    let s3 = "🎉🎉";
+
+    println!("{}: {} {}", s1, s1.len(), s1.chars().collect::<Vec<_>>().len());
+    println!("{}: {} {}", s2, s2.len(), s2.chars().collect::<Vec<_>>().len());
+    println!("{}: {} {}", s3, s3.len(), s3.chars().collect::<Vec<_>>().len());
+}
\ No newline at end of file
diff --git a/__std/misc/src/bin/test_test.rs b/__std/misc/src/bin/test_test.rs
new file mode 100644
index 0000000..8e2e053
--- /dev/null
+++ b/__std/misc/src/bin/test_test.rs
@@ -0,0 +1,11 @@
+fn add(a: i32, b: i32) -> i32 {
+    a + b
+}
+
+#[test]
+fn test_01() {
+    assert_eq!(2, add(1, 1));
+    assert_eq!(3, add(1, 2));
+}
+
+fn main() {}
diff --git a/__std/misc/src/bin/tuple_test.rs b/__std/misc/src/bin/tuple_test.rs
new file mode 100644
index 0000000..969ea8f
--- /dev/null
+++ b/__std/misc/src/bin/tuple_test.rs
@@ -0,0 +1,8 @@
+fn get_person_info() -> (String, i32) {
+    ("Hatter".into(), 40)
+}
+
+fn main() {
+    let (name, age) = get_person_info();
+    println!("{} is {} year(s) old", name, age);
+}
\ No newline at end of file
diff --git a/__std/misc/src/bin/vec_test.rs b/__std/misc/src/bin/vec_test.rs
new file mode 100644
index 0000000..bfb176a
--- /dev/null
+++ b/__std/misc/src/bin/vec_test.rs
@@ -0,0 +1,9 @@
+fn main() {
+    let mut arr = vec![1, 2, 3, 4, 5];
+    arr.push(6);
+    println!("{:?}", arr);
+    println!("First value: {}", arr[0]);
+    println!("Last value: {}", arr[arr.len() - 1]);
+    let sum = arr.into_iter().reduce(|a, b| a + b);
+    println!("Sum: {:?}", sum);
+}
\ No newline at end of file
diff --git a/__std/misc/src/bin/while2_test.rs b/__std/misc/src/bin/while2_test.rs
new file mode 100644
index 0000000..9052384
--- /dev/null
+++ b/__std/misc/src/bin/while2_test.rs
@@ -0,0 +1,7 @@
+fn main() {
+    let mut i = 0;
+    while i <= 99 {
+        println!("#i: {}", i);
+        i += 1;
+    }
+}
\ No newline at end of file
diff --git a/__std/misc/src/bin/while_true_test.rs b/__std/misc/src/bin/while_true_test.rs
new file mode 100644
index 0000000..21f5071
--- /dev/null
+++ b/__std/misc/src/bin/while_true_test.rs
@@ -0,0 +1,10 @@
+fn main() {
+    let mut i = 0;
+    while true {
+        println!("#i: {}", i);
+        i += 1;
+        if i > 99 {
+            break;
+        }
+    }
+}
\ No newline at end of file