diff --git a/sdk/cmake/README.md b/sdk/cmake/README.md
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+## Cmake Build System
+This directory contains a set of .cmake files that provide the necessary configuration and functionality for the build
+process. These files provide the necessary toolchain configuration, additional functions for the build system, and QEMU
+configuration for testing the XT Operating System.
diff --git a/sdk/ovmf/README.md b/sdk/ovmf/README.md
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+## Open Virtual Machine Firmware (OVMF)
+This directory contains the essential components of the Open Virtual Machine Firmware (OVMF), which provides
+an open-source implementation of the Unified Extensible Firmware Interface (UEFI) for virtual machines.
+
+The ovmf_code files contain the CPU architecture specific UEFI firmware code, which serves as the initial boot code
+for virtual machines used to test the XTOS. It includes the necessary instructions and functions to initialize hardware,
+load the operating system, and provide various system services during the boot process. The ovmf_code file is
+responsible for establishing a UEFI environment within the virtual machine, enabling it to boot and operate effectively.
+
+The ovmf_vars files, store UEFI variables, which are used to store and retrieve system configuration information, such as
+boot options, device settings, and system preferences. The ovmf_vars file contains the persistent variables specific to
+a virtual machine, allowing it to maintain its configuration across multiple boot sessions.
diff --git a/xtldr/README.md b/xtldr/README.md
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+## XT Loader (XTLDR)
+The XTLDR, or XTOS Boot Loader, is an EFI (Extensible Firmware Interface) boot loader specifically designed for XTOS.
+As an EFI boot loader, XTLDR operates exclusively with EFI-based hardware and is not compatible with non-EFI systems,
+like old and deprecated BIOS.
+
+One of the notable features of XTLDR is its modular design. The boot loader is divided into different modules, with only
+the essential core being loaded during the boot process. This modular approach allows for a more efficient and
+streamlined boot experience, as only the necessary functionality is loaded, reducing the boot time and system resource
+usage.
+
+XTLDR includes various modules that provide specific functionalities required for the boot process. For example, there is
+a module dedicated to supporting the XTOS boot protocol, which is the specific protocol used by XTOS for loading and
+executing the OS kernel. Additionally, there is a module for handling PE/COFF (Portable Executable) binaries, which is
+a commonly used format of executable files used by the XTOS.