diff --git a/modules/nedelin_d_number_to_words_lab3/CMakeLists.txt b/modules/nedelin_d_number_to_words_lab3/CMakeLists.txt
new file mode 100644
index 00000000..5c277256
--- /dev/null
+++ b/modules/nedelin_d_number_to_words_lab3/CMakeLists.txt
@@ -0,0 +1,20 @@
+# Declare variables for binaries' names
+get_filename_component(DIR_NAME ${CMAKE_CURRENT_LIST_DIR} NAME)
+set(MODULE      "${DIR_NAME}")
+set(LIBRARY     "lib_${MODULE}")
+set(TESTS       "test_${MODULE}")
+set(APPLICATION "app_${MODULE}")
+
+# Include directory with public headers
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+
+# Add all submodules
+add_subdirectory(src)
+add_subdirectory(test)
+add_subdirectory(application)
+
+#############################################
+##### Testing
+#############################################
+
+include("CTestTests.txt")
diff --git a/modules/nedelin_d_number_to_words_lab3/CTestTests.txt b/modules/nedelin_d_number_to_words_lab3/CTestTests.txt
new file mode 100644
index 00000000..1b65d7b9
--- /dev/null
+++ b/modules/nedelin_d_number_to_words_lab3/CTestTests.txt
@@ -0,0 +1,97 @@
+#############################################
+##### Testing
+#############################################
+
+set(prefix "${MODULE}")
+
+add_test(
+    NAME ${prefix}_convert_zero
+    COMMAND ${APPLICATION} "0"
+)
+set_tests_properties(${prefix}_convert_zero PROPERTIES
+    PASS_REGULAR_EXPRESSION "zero"
+    LABELS "${MODULE}"
+)
+
+add_test(
+    NAME ${prefix}_convert_one
+    COMMAND ${APPLICATION} "1"
+)
+set_tests_properties(${prefix}_convert_one PROPERTIES
+    PASS_REGULAR_EXPRESSION "one"
+    LABELS "${MODULE}"
+)
+
+add_test(
+    NAME ${prefix}_convert_negative
+    COMMAND ${APPLICATION} "-123"
+)
+set_tests_properties(${prefix}_convert_negative PROPERTIES
+    PASS_REGULAR_EXPRESSION "negative one hundred twenty three"
+    LABELS "${MODULE}"
+)
+
+add_test(
+    NAME ${prefix}_convert_large_number
+    COMMAND ${APPLICATION} "1000000"
+)
+set_tests_properties(${prefix}_convert_large_number PROPERTIES
+    PASS_REGULAR_EXPRESSION "one million"
+    LABELS "${MODULE}"
+)
+
+add_test(
+    NAME ${prefix}_convert_edge_case_twenty
+    COMMAND ${APPLICATION} "20"
+)
+set_tests_properties(${prefix}_convert_edge_case_twenty PROPERTIES
+    PASS_REGULAR_EXPRESSION "twenty"
+    LABELS "${MODULE}"
+)
+
+# Тесты для ошибок и невалидных вводов
+add_test(
+    NAME ${prefix}_invalid_input
+    COMMAND ${APPLICATION} "abc"
+)
+set_tests_properties(${prefix}_invalid_input PROPERTIES
+    PASS_REGULAR_EXPRESSION "Invalid number format!"
+    LABELS "${MODULE}"
+)
+
+add_test(
+    NAME ${prefix}_missing_argument
+    COMMAND ${APPLICATION}
+)
+set_tests_properties(${prefix}_missing_argument PROPERTIES
+    PASS_REGULAR_EXPRESSION "Usage: number_to_words <number>"
+    LABELS "${MODULE}"
+)
+
+add_test(
+    NAME ${prefix}_extra_argument
+    COMMAND ${APPLICATION} "123" "456"
+)
+set_tests_properties(${prefix}_extra_argument PROPERTIES
+    PASS_REGULAR_EXPRESSION "Usage: number_to_words <number>"
+    LABELS "${MODULE}"
+)
+
+# Граничные значения
+add_test(
+    NAME ${prefix}_convert_min_int
+    COMMAND ${APPLICATION} "-2147483648"
+)
+set_tests_properties(${prefix}_convert_min_int PROPERTIES
+    PASS_REGULAR_EXPRESSION "negative two billion one hundred forty seven million four hundred eighty three thousand six hundred forty eight"
+    LABELS "${MODULE}"
+)
+
+add_test(
+    NAME ${prefix}_convert_max_int
+    COMMAND ${APPLICATION} "2147483647"
+)
+set_tests_properties(${prefix}_convert_max_int PROPERTIES
+    PASS_REGULAR_EXPRESSION "two billion one hundred forty seven million four hundred eighty three thousand six hundred forty seven"
+    LABELS "${MODULE}"
+)
\ No newline at end of file
diff --git a/modules/nedelin_d_number_to_words_lab3/application/Application.cpp b/modules/nedelin_d_number_to_words_lab3/application/Application.cpp
new file mode 100644
index 00000000..3832db01
--- /dev/null
+++ b/modules/nedelin_d_number_to_words_lab3/application/Application.cpp
@@ -0,0 +1,14 @@
+// Copyright 2024 Nedelin Dmitry
+
+#include <iostream>
+
+#include "include/number_to_wordsApp.h"
+
+int main(int argc, const char** argv) {
+  Application app;
+  auto output = app.runApp(argc, argv);
+  for (auto str : output) {
+    std::cout << str << std::endl;
+  }
+  return 0;
+}
diff --git a/modules/nedelin_d_number_to_words_lab3/application/CMakeLists.txt b/modules/nedelin_d_number_to_words_lab3/application/CMakeLists.txt
new file mode 100644
index 00000000..e8a53c3d
--- /dev/null
+++ b/modules/nedelin_d_number_to_words_lab3/application/CMakeLists.txt
@@ -0,0 +1,15 @@
+set(target ${APPLICATION})
+
+file(GLOB srcs "*.cpp")
+set_source_files_properties(${srcs} PROPERTIES
+    LABELS "${MODULE};Application")
+
+add_executable(${target} ${srcs})
+set_target_properties(${target} PROPERTIES
+    OUTPUT_NAME ${MODULE}
+    LABELS "${MODULE};Application")
+
+target_link_libraries(${target} ${LIBRARY})
+if (UNIX)
+  target_link_libraries(${target} ${CMAKE_THREAD_LIBS_INIT})
+endif (UNIX)
diff --git a/modules/nedelin_d_number_to_words_lab3/include/number_to_words.h b/modules/nedelin_d_number_to_words_lab3/include/number_to_words.h
new file mode 100644
index 00000000..2bb7cf52
--- /dev/null
+++ b/modules/nedelin_d_number_to_words_lab3/include/number_to_words.h
@@ -0,0 +1,16 @@
+// Copyright 2024 Nedelin Dmitry
+
+#ifndef MODULES_NEDELIN_D_NUMBER_TO_WORDS_LAB3_INCLUDE_NUMBER_TO_WORDS_H_
+#define MODULES_NEDELIN_D_NUMBER_TO_WORDS_LAB3_INCLUDE_NUMBER_TO_WORDS_H_
+
+#include <string>
+
+class NumberToWords {
+ public:
+  std::string convert(int number);
+
+ private:
+  std::string convertLessThanOneThousand(int number);
+};
+
+#endif  // MODULES_NEDELIN_D_NUMBER_TO_WORDS_LAB3_INCLUDE_NUMBER_TO_WORDS_H_
diff --git a/modules/nedelin_d_number_to_words_lab3/include/number_to_wordsApp.h b/modules/nedelin_d_number_to_words_lab3/include/number_to_wordsApp.h
new file mode 100644
index 00000000..855004a2
--- /dev/null
+++ b/modules/nedelin_d_number_to_words_lab3/include/number_to_wordsApp.h
@@ -0,0 +1,17 @@
+// Copyright 2024 Nedelin Dmitry
+
+#ifndef MODULES_NEDELIN_D_NUMBER_TO_WORDS_LAB3_INCLUDE_NUMBER_TO_WORDSAPP_H_
+#define MODULES_NEDELIN_D_NUMBER_TO_WORDS_LAB3_INCLUDE_NUMBER_TO_WORDSAPP_H_
+
+#include <string>
+#include <vector>
+
+class Application{
+ public:
+    std::vector<std::string> runApp(int argc, const char** argv);
+
+ private:
+    std::string processNumber(const std::string& input);
+};
+
+#endif  // MODULES_NEDELIN_D_NUMBER_TO_WORDS_LAB3_INCLUDE_NUMBER_TO_WORDSAPP_H_
diff --git a/modules/nedelin_d_number_to_words_lab3/src/CMakeLists.txt b/modules/nedelin_d_number_to_words_lab3/src/CMakeLists.txt
new file mode 100644
index 00000000..b1dc57b0
--- /dev/null
+++ b/modules/nedelin_d_number_to_words_lab3/src/CMakeLists.txt
@@ -0,0 +1,18 @@
+set(target ${LIBRARY})
+
+file(GLOB srcs "*.cpp")
+file(GLOB hdrs "../include/*.h")
+set_source_files_properties(${srcs} ${hdrs} PROPERTIES
+    LABELS "${MODULE};Library")
+
+add_library(${target} STATIC ${srcs} ${hdrs})
+set_target_properties(${target} PROPERTIES
+    OUTPUT_NAME ${MODULE}
+    LABELS "${MODULE};Library")
+
+if (UNIX)
+  target_link_libraries(${target} ${CMAKE_THREAD_LIBS_INIT})
+endif (UNIX)
+target_link_libraries(${target} ${LIBRARY_DEPS})
+
+set(LIBRARY_DEPS "${LIBRARY_DEPS};${target}" PARENT_SCOPE)
diff --git a/modules/nedelin_d_number_to_words_lab3/src/number_to_words.cpp b/modules/nedelin_d_number_to_words_lab3/src/number_to_words.cpp
new file mode 100644
index 00000000..b7ced8d2
--- /dev/null
+++ b/modules/nedelin_d_number_to_words_lab3/src/number_to_words.cpp
@@ -0,0 +1,100 @@
+// Copyright 2024 Nedelin Dmitry
+
+#include "include/number_to_words.h"
+
+#include <climits>
+#include <sstream>
+#include <array>
+
+std::string trim(const std::string& str) {
+    std::string trimmed = str;
+    auto end = trimmed.find_last_not_of(' ');
+    if (end != std::string::npos) {
+        trimmed.erase(end + 1);
+    }
+    return trimmed;
+}
+
+std::string NumberToWords::convert(int number) {
+    if (number == 0) {
+        return "zero";
+    }
+    if (number == INT_MIN) {
+        return "negative two billion one hundred forty seven million four "
+               "hundred eighty three thousand six hundred forty eight";
+    }
+
+    std::stringstream ss;
+
+    if (number < 0) {
+        ss << "negative ";
+        number = -number;
+    }
+
+    static constexpr int BILLION = 1000000000;
+    static constexpr int MILLION = 1000000;
+    static constexpr int THOUSAND = 1000;
+
+    if (number >= BILLION) {
+        ss << convertLessThanOneThousand(number / BILLION) << " billion";
+        number %= BILLION;
+        if (number > 0) {
+            ss << " ";
+        }
+    }
+
+    if (number >= MILLION) {
+        ss << convertLessThanOneThousand(number / MILLION) << " million";
+        number %= MILLION;
+        if (number > 0) {
+            ss << " ";
+        }
+    }
+
+    if (number >= THOUSAND) {
+        ss << convertLessThanOneThousand(number / THOUSAND) << " thousand";
+        number %= THOUSAND;
+        if (number > 0) {
+            ss << " ";
+        }
+    }
+
+    if (number > 0) {
+        ss << convertLessThanOneThousand(number);
+    }
+
+    return trim(ss.str());
+}
+
+std::string NumberToWords::convertLessThanOneThousand(int number) {
+    static const std::array<std::string, 20> units{
+        "zero", "one", "two", "three", "four", "five", "six", "seven", "eight",
+        "nine", "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen",
+        "sixteen", "seventeen", "eighteen", "nineteen"
+    };
+    static const std::array<std::string, 10> tens{
+        "", "", "twenty", "thirty", "forty", "fifty", "sixty",
+        "seventy", "eighty", "ninety"
+    };
+
+    std::stringstream ss;
+    if (number >= 100) {
+        ss << units[number / 100] << " hundred";
+        number %= 100;
+        if (number > 0) {
+            ss << " ";
+        }
+    }
+    if (number >= 20) {
+        ss << tens[number / 10];
+        number %= 10;
+        if (number > 0) {
+            ss << " ";
+        }
+    }
+    if (number > 0) {
+        ss << units[number];
+    }
+
+    return ss.str();
+}
diff --git a/modules/nedelin_d_number_to_words_lab3/src/number_to_wordsApp.cpp b/modules/nedelin_d_number_to_words_lab3/src/number_to_wordsApp.cpp
new file mode 100644
index 00000000..a0ed37dd
--- /dev/null
+++ b/modules/nedelin_d_number_to_words_lab3/src/number_to_wordsApp.cpp
@@ -0,0 +1,39 @@
+// Copyright 2024 Nedelin Dmitry
+
+#include "include/number_to_words.h"
+#include "include/number_to_wordsApp.h"
+
+#include <stdexcept>
+#include <sstream>
+
+std::vector<std::string> Application::runApp(int argc, const char** argv) {
+    std::vector<std::string> output;
+
+    if (argc != 2) {
+        output.push_back("Usage: number_to_words <number>");
+        return output;
+    }
+
+    std::string input = argv[1];
+    try {
+        output.push_back(processNumber(input));
+    }
+    catch (const std::invalid_argument&) {
+        output.push_back("Invalid number format!");
+    }
+
+    return output;
+}
+
+std::string Application::processNumber(const std::string& input) {
+    int number;
+    try {
+        number = std::stoi(input);
+    }
+    catch (...) {
+        throw std::invalid_argument("Invalid input");
+    }
+
+    NumberToWords converter;
+    return converter.convert(number);
+}
diff --git a/modules/nedelin_d_number_to_words_lab3/test/CMakeLists.txt b/modules/nedelin_d_number_to_words_lab3/test/CMakeLists.txt
new file mode 100644
index 00000000..cd06c57b
--- /dev/null
+++ b/modules/nedelin_d_number_to_words_lab3/test/CMakeLists.txt
@@ -0,0 +1,27 @@
+set(target ${TESTS})
+
+file(GLOB srcs "*.cpp")
+set_source_files_properties(${srcs} PROPERTIES
+    LABELS "${MODULE};Test")
+
+add_executable(${target} ${srcs} ${hdrs})
+set_target_properties(${target} PROPERTIES
+    LABELS "${MODULE};Test")
+
+if (UNIX)
+  target_link_libraries(${target} gtest ${CMAKE_THREAD_LIBS_INIT} pthread)
+endif (UNIX)
+target_link_libraries(${target} gtest ${LIBRARY})
+
+# VS2012 doesn't support correctly the tuples yet,
+# see http://code.google.com/p/googletest/issues/detail?id=412
+if(MSVC)
+    target_compile_definitions(${target} PUBLIC _VARIADIC_MAX=10)
+endif()
+
+add_test(
+    NAME ${MODULE}_gtest
+    COMMAND ${target}
+)
+set_tests_properties (${MODULE}_gtest PROPERTIES
+    LABELS "${MODULE}")
diff --git a/modules/nedelin_d_number_to_words_lab3/test/test_main.cpp b/modules/nedelin_d_number_to_words_lab3/test/test_main.cpp
new file mode 100644
index 00000000..ffd4f722
--- /dev/null
+++ b/modules/nedelin_d_number_to_words_lab3/test/test_main.cpp
@@ -0,0 +1,9 @@
+// Copyright 2024 Nedelin Dmitry
+
+#include <gtest/gtest.h>
+#include "include/number_to_wordsApp.h"
+
+int main(int argc, char** argv) {
+    ::testing::InitGoogleTest(&argc, argv);
+    return RUN_ALL_TESTS();
+}
diff --git a/modules/nedelin_d_number_to_words_lab3/test/test_number_to_words.cpp b/modules/nedelin_d_number_to_words_lab3/test/test_number_to_words.cpp
new file mode 100644
index 00000000..ce8abb80
--- /dev/null
+++ b/modules/nedelin_d_number_to_words_lab3/test/test_number_to_words.cpp
@@ -0,0 +1,118 @@
+// Copyright 2024 Nedelin Dmitry
+
+#include <gtest/gtest.h>
+#include <climits>
+
+#include "include/number_to_words.h"
+#include "include/number_to_wordsApp.h"
+
+TEST(NumberToWordsTest, ConvertZero) {
+    NumberToWords converter;
+    ASSERT_EQ(converter.convert(0), "zero");
+}
+
+TEST(NumberToWordsTest, ConvertPositiveNumbers) {
+    NumberToWords converter;
+    ASSERT_EQ(converter.convert(1), "one");
+    ASSERT_EQ(converter.convert(12), "twelve");
+    ASSERT_EQ(converter.convert(123), "one hundred twenty three");
+    ASSERT_EQ(converter.convert(1234),
+        "one thousand two hundred thirty four");
+    ASSERT_EQ(converter.convert(1234567),
+        "one million two hundred thirty four thousand "
+        "five hundred sixty seven");
+}
+
+TEST(NumberToWordsTest, ConvertNegativeNumbers) {
+    NumberToWords converter;
+    ASSERT_EQ(converter.convert(-1), "negative one");
+    ASSERT_EQ(converter.convert(-12), "negative twelve");
+    ASSERT_EQ(converter.convert(-123), "negative one hundred twenty three");
+}
+
+TEST(NumberToWordsTest, ConvertLargeNumbers) {
+    NumberToWords converter;
+    ASSERT_EQ(converter.convert(1000000000), "one billion");
+    ASSERT_EQ(converter.convert(1172839450),
+        "one billion one hundred seventy two million eight hundred "
+        "thirty nine thousand four hundred fifty");
+}
+
+TEST(NumberToWordsTest, ConvertNegativeLargeNumbers) {
+    NumberToWords converter;
+    ASSERT_EQ(converter.convert(-1000000000), "negative one billion");
+    ASSERT_EQ(converter.convert(-1172839450),
+        "negative one billion one hundred seventy two million "
+        "eight hundred thirty nine thousand four hundred fifty");
+}
+
+TEST(NumberToWordsTest, ConvertEdgeCases) {
+    NumberToWords converter;
+    ASSERT_EQ(converter.convert(0), "zero");
+    ASSERT_EQ(converter.convert(INT_MAX),
+        "two billion one hundred forty seven million four hundred "
+        "eighty three thousand six hundred forty seven");
+    ASSERT_EQ(converter.convert(INT_MIN),
+        "negative two billion one hundred forty seven million four "
+        "hundred eighty three thousand six hundred forty eight");
+}
+
+TEST(NumberToWordsTest, ConvertTensAndUnits) {
+    NumberToWords converter;
+    ASSERT_EQ(converter.convert(20), "twenty");
+    ASSERT_EQ(converter.convert(99), "ninety nine");
+    ASSERT_EQ(converter.convert(101), "one hundred one");
+    ASSERT_EQ(converter.convert(111), "one hundred eleven");
+}
+
+TEST(ApplicationTest, ValidInput_PositiveNumber) {
+    Application app;
+    const char* argv[] = { "app", "123" };
+    auto output = app.runApp(2, argv);
+    ASSERT_EQ(output.size(), static_cast<size_t>(1));
+    EXPECT_EQ(output[0], "one hundred twenty three");
+}
+
+TEST(ApplicationTest, ValidInput_NegativeNumber) {
+    Application app;
+    const char* argv[] = { "app", "-456" };
+    auto output = app.runApp(2, argv);
+    ASSERT_EQ(output.size(), static_cast<size_t>(1));
+    EXPECT_EQ(output[0], "negative four hundred fifty six");
+}
+
+TEST(ApplicationTest, InvalidInput_NonNumeric) {
+    Application app;
+    const char* argv[] = { "app", "abc" };
+    auto output = app.runApp(2, argv);
+    ASSERT_EQ(output.size(), static_cast<size_t>(1));
+    EXPECT_EQ(output[0], "Invalid number format!");
+}
+
+TEST(ApplicationTest, MissingArgument) {
+    Application app;
+    const char* argv[] = { "app" };
+    auto output = app.runApp(1, argv);
+    ASSERT_EQ(output.size(), static_cast<size_t>(1));
+    EXPECT_EQ(output[0], "Usage: number_to_words <number>");
+}
+
+TEST(ApplicationTest, Boundary_MinInt) {
+    Application app;
+    const char* argv[] = { "app", "-2147483648" };
+    auto output = app.runApp(2, argv);
+    ASSERT_EQ(output.size(), static_cast<size_t>(1));
+    EXPECT_EQ(output[0],
+        "negative two billion one hundred forty seven million four "
+        "hundred eighty three thousand six hundred forty eight");
+}
+
+TEST(ApplicationTest, Boundary_MaxInt) {
+    Application app;
+    const char* argv[] = { "app", "2147483647" };
+    auto output = app.runApp(2, argv);
+    ASSERT_EQ(output.size(), static_cast<size_t>(1));
+    EXPECT_EQ(output[0],
+        "two billion one hundred forty seven million four hundred "
+        "eighty three thousand six hundred forty seven");
+}