diff --git a/src/engine/core/FS/disk_file_device.cpp b/src/engine/core/fs/disk_file_device.cpp
similarity index 100%
rename from src/engine/core/FS/disk_file_device.cpp
rename to src/engine/core/fs/disk_file_device.cpp
diff --git a/src/engine/core/FS/disk_file_device.h b/src/engine/core/fs/disk_file_device.h
similarity index 100%
rename from src/engine/core/FS/disk_file_device.h
rename to src/engine/core/fs/disk_file_device.h
diff --git a/src/engine/core/FS/file_events_device.cpp b/src/engine/core/fs/file_events_device.cpp
similarity index 100%
rename from src/engine/core/FS/file_events_device.cpp
rename to src/engine/core/fs/file_events_device.cpp
diff --git a/src/engine/core/FS/file_events_device.h b/src/engine/core/fs/file_events_device.h
similarity index 100%
rename from src/engine/core/FS/file_events_device.h
rename to src/engine/core/fs/file_events_device.h
diff --git a/src/engine/core/FS/file_system.cpp b/src/engine/core/fs/file_system.cpp
similarity index 100%
rename from src/engine/core/FS/file_system.cpp
rename to src/engine/core/fs/file_system.cpp
diff --git a/src/engine/core/FS/file_system.h b/src/engine/core/fs/file_system.h
similarity index 100%
rename from src/engine/core/FS/file_system.h
rename to src/engine/core/fs/file_system.h
diff --git a/src/engine/core/FS/ifile_device.h b/src/engine/core/fs/ifile_device.h
similarity index 100%
rename from src/engine/core/FS/ifile_device.h
rename to src/engine/core/fs/ifile_device.h
diff --git a/src/engine/core/FS/memory_file_device.cpp b/src/engine/core/fs/memory_file_device.cpp
similarity index 100%
rename from src/engine/core/FS/memory_file_device.cpp
rename to src/engine/core/fs/memory_file_device.cpp
diff --git a/src/engine/core/FS/memory_file_device.h b/src/engine/core/fs/memory_file_device.h
similarity index 100%
rename from src/engine/core/FS/memory_file_device.h
rename to src/engine/core/fs/memory_file_device.h
diff --git a/src/engine/core/FS/os_file.h b/src/engine/core/fs/os_file.h
similarity index 100%
rename from src/engine/core/FS/os_file.h
rename to src/engine/core/fs/os_file.h
diff --git a/src/engine/core/FS/pack_file_device.cpp b/src/engine/core/fs/pack_file_device.cpp
similarity index 100%
rename from src/engine/core/FS/pack_file_device.cpp
rename to src/engine/core/fs/pack_file_device.cpp
diff --git a/src/engine/core/FS/pack_file_device.h b/src/engine/core/fs/pack_file_device.h
similarity index 100%
rename from src/engine/core/FS/pack_file_device.h
rename to src/engine/core/fs/pack_file_device.h
diff --git a/src/engine/core/FS/pc/os_file.cpp b/src/engine/core/fs/pc/os_file.cpp
similarity index 100%
rename from src/engine/core/FS/pc/os_file.cpp
rename to src/engine/core/fs/pc/os_file.cpp
diff --git a/src/engine/core/FS/tcp_file_device.cpp b/src/engine/core/fs/tcp_file_device.cpp
similarity index 100%
rename from src/engine/core/FS/tcp_file_device.cpp
rename to src/engine/core/fs/tcp_file_device.cpp
diff --git a/src/engine/core/FS/tcp_file_device.h b/src/engine/core/fs/tcp_file_device.h
similarity index 100%
rename from src/engine/core/FS/tcp_file_device.h
rename to src/engine/core/fs/tcp_file_device.h
diff --git a/src/engine/core/FS/tcp_file_server.cpp b/src/engine/core/fs/tcp_file_server.cpp
similarity index 100%
rename from src/engine/core/FS/tcp_file_server.cpp
rename to src/engine/core/fs/tcp_file_server.cpp
diff --git a/src/engine/core/FS/tcp_file_server.h b/src/engine/core/fs/tcp_file_server.h
similarity index 100%
rename from src/engine/core/FS/tcp_file_server.h
rename to src/engine/core/fs/tcp_file_server.h
diff --git a/src/engine/core/MT/atomic.h b/src/engine/core/mt/atomic.h
similarity index 100%
rename from src/engine/core/MT/atomic.h
rename to src/engine/core/mt/atomic.h
diff --git a/src/engine/core/MT/lock_free_fixed_queue.h b/src/engine/core/mt/lock_free_fixed_queue.h
similarity index 100%
rename from src/engine/core/MT/lock_free_fixed_queue.h
rename to src/engine/core/mt/lock_free_fixed_queue.h
diff --git a/src/engine/core/MT/osx/event.cpp b/src/engine/core/mt/osx/event.cpp
similarity index 100%
rename from src/engine/core/MT/osx/event.cpp
rename to src/engine/core/mt/osx/event.cpp
diff --git a/src/engine/core/MT/osx/mutex.cpp b/src/engine/core/mt/osx/mutex.cpp
similarity index 100%
rename from src/engine/core/MT/osx/mutex.cpp
rename to src/engine/core/mt/osx/mutex.cpp
diff --git a/src/engine/core/MT/osx/semaphore.cpp b/src/engine/core/mt/osx/semaphore.cpp
similarity index 100%
rename from src/engine/core/MT/osx/semaphore.cpp
rename to src/engine/core/mt/osx/semaphore.cpp
diff --git a/src/engine/core/MT/osx/spin_mutex.cpp b/src/engine/core/mt/osx/spin_mutex.cpp
similarity index 100%
rename from src/engine/core/MT/osx/spin_mutex.cpp
rename to src/engine/core/mt/osx/spin_mutex.cpp
diff --git a/src/engine/core/MT/osx/task.cpp b/src/engine/core/mt/osx/task.cpp
similarity index 100%
rename from src/engine/core/MT/osx/task.cpp
rename to src/engine/core/mt/osx/task.cpp
diff --git a/src/engine/core/MT/pc/atomic.cpp b/src/engine/core/mt/pc/atomic.cpp
similarity index 100%
rename from src/engine/core/MT/pc/atomic.cpp
rename to src/engine/core/mt/pc/atomic.cpp
diff --git a/src/engine/core/MT/pc/sync.cpp b/src/engine/core/mt/pc/sync.cpp
similarity index 100%
rename from src/engine/core/MT/pc/sync.cpp
rename to src/engine/core/mt/pc/sync.cpp
diff --git a/src/engine/core/MT/pc/task.cpp b/src/engine/core/mt/pc/task.cpp
similarity index 100%
rename from src/engine/core/MT/pc/task.cpp
rename to src/engine/core/mt/pc/task.cpp
diff --git a/src/engine/core/MT/pc/thread.cpp b/src/engine/core/mt/pc/thread.cpp
similarity index 100%
rename from src/engine/core/MT/pc/thread.cpp
rename to src/engine/core/mt/pc/thread.cpp
diff --git a/src/engine/core/MT/sync.h b/src/engine/core/mt/sync.h
similarity index 100%
rename from src/engine/core/MT/sync.h
rename to src/engine/core/mt/sync.h
diff --git a/src/engine/core/MT/task.h b/src/engine/core/mt/task.h
similarity index 100%
rename from src/engine/core/MT/task.h
rename to src/engine/core/mt/task.h
diff --git a/src/engine/core/MT/thread.h b/src/engine/core/mt/thread.h
similarity index 100%
rename from src/engine/core/MT/thread.h
rename to src/engine/core/mt/thread.h
diff --git a/src/engine/core/MT/transaction.h b/src/engine/core/mt/transaction.h
similarity index 100%
rename from src/engine/core/MT/transaction.h
rename to src/engine/core/mt/transaction.h
diff --git a/src/engine/core/MTJD/base_entry.cpp b/src/engine/core/mtjd/base_entry.cpp
similarity index 100%
rename from src/engine/core/MTJD/base_entry.cpp
rename to src/engine/core/mtjd/base_entry.cpp
diff --git a/src/engine/core/MTJD/base_entry.h b/src/engine/core/mtjd/base_entry.h
similarity index 100%
rename from src/engine/core/MTJD/base_entry.h
rename to src/engine/core/mtjd/base_entry.h
diff --git a/src/engine/core/MTJD/enums.h b/src/engine/core/mtjd/enums.h
similarity index 100%
rename from src/engine/core/MTJD/enums.h
rename to src/engine/core/mtjd/enums.h
diff --git a/src/engine/core/MTJD/generic_job.h b/src/engine/core/mtjd/generic_job.h
similarity index 100%
rename from src/engine/core/MTJD/generic_job.h
rename to src/engine/core/mtjd/generic_job.h
diff --git a/src/engine/core/MTJD/group.cpp b/src/engine/core/mtjd/group.cpp
similarity index 100%
rename from src/engine/core/MTJD/group.cpp
rename to src/engine/core/mtjd/group.cpp
diff --git a/src/engine/core/MTJD/group.h b/src/engine/core/mtjd/group.h
similarity index 100%
rename from src/engine/core/MTJD/group.h
rename to src/engine/core/mtjd/group.h
diff --git a/src/engine/core/MTJD/job.cpp b/src/engine/core/mtjd/job.cpp
similarity index 100%
rename from src/engine/core/MTJD/job.cpp
rename to src/engine/core/mtjd/job.cpp
diff --git a/src/engine/core/MTJD/job.h b/src/engine/core/mtjd/job.h
similarity index 100%
rename from src/engine/core/MTJD/job.h
rename to src/engine/core/mtjd/job.h
diff --git a/src/engine/core/MTJD/manager.cpp b/src/engine/core/mtjd/manager.cpp
similarity index 100%
rename from src/engine/core/MTJD/manager.cpp
rename to src/engine/core/mtjd/manager.cpp
diff --git a/src/engine/core/MTJD/manager.h b/src/engine/core/mtjd/manager.h
similarity index 100%
rename from src/engine/core/MTJD/manager.h
rename to src/engine/core/mtjd/manager.h
diff --git a/src/engine/core/MTJD/scheduler.cpp b/src/engine/core/mtjd/scheduler.cpp
similarity index 100%
rename from src/engine/core/MTJD/scheduler.cpp
rename to src/engine/core/mtjd/scheduler.cpp
diff --git a/src/engine/core/MTJD/scheduler.h b/src/engine/core/mtjd/scheduler.h
similarity index 100%
rename from src/engine/core/MTJD/scheduler.h
rename to src/engine/core/mtjd/scheduler.h
diff --git a/src/engine/core/MTJD/worker_thread.cpp b/src/engine/core/mtjd/worker_thread.cpp
similarity index 100%
rename from src/engine/core/MTJD/worker_thread.cpp
rename to src/engine/core/mtjd/worker_thread.cpp
diff --git a/src/engine/core/MTJD/worker_thread.h b/src/engine/core/mtjd/worker_thread.h
similarity index 100%
rename from src/engine/core/MTJD/worker_thread.h
rename to src/engine/core/mtjd/worker_thread.h