diff --git a/docs/technical_references/code_sharing.rst b/docs/technical_references/design_docs/code_sharing.rst
similarity index 100%
rename from docs/technical_references/code_sharing.rst
rename to docs/technical_references/design_docs/code_sharing.rst
diff --git a/docs/technical_references/dual-cpu/booting_a_dual_core_system.rst b/docs/technical_references/design_docs/dual-cpu/booting_a_dual_core_system.rst
similarity index 100%
rename from docs/technical_references/dual-cpu/booting_a_dual_core_system.rst
rename to docs/technical_references/design_docs/dual-cpu/booting_a_dual_core_system.rst
diff --git a/docs/technical_references/dual-cpu/communication_prototype_between_nspe_and_spe_in_dual_core_systems.rst b/docs/technical_references/design_docs/dual-cpu/communication_prototype_between_nspe_and_spe_in_dual_core_systems.rst
similarity index 100%
rename from docs/technical_references/dual-cpu/communication_prototype_between_nspe_and_spe_in_dual_core_systems.rst
rename to docs/technical_references/design_docs/dual-cpu/communication_prototype_between_nspe_and_spe_in_dual_core_systems.rst
diff --git a/docs/technical_references/dual-cpu/dual_core_mailbox_arch.png b/docs/technical_references/design_docs/dual-cpu/dual_core_mailbox_arch.png
similarity index 100%
rename from docs/technical_references/dual-cpu/dual_core_mailbox_arch.png
rename to docs/technical_references/design_docs/dual-cpu/dual_core_mailbox_arch.png
Binary files differ
diff --git a/docs/technical_references/dual-cpu/index.rst b/docs/technical_references/design_docs/dual-cpu/index.rst
similarity index 100%
rename from docs/technical_references/dual-cpu/index.rst
rename to docs/technical_references/design_docs/dual-cpu/index.rst
diff --git a/docs/technical_references/dual-cpu/mailbox_design_on_dual_core_system.rst b/docs/technical_references/design_docs/dual-cpu/mailbox_design_on_dual_core_system.rst
similarity index 100%
rename from docs/technical_references/dual-cpu/mailbox_design_on_dual_core_system.rst
rename to docs/technical_references/design_docs/dual-cpu/mailbox_design_on_dual_core_system.rst
diff --git a/docs/technical_references/dual-cpu/tfm_multi_core_access_check.rst b/docs/technical_references/design_docs/dual-cpu/tfm_multi_core_access_check.rst
similarity index 100%
rename from docs/technical_references/dual-cpu/tfm_multi_core_access_check.rst
rename to docs/technical_references/design_docs/dual-cpu/tfm_multi_core_access_check.rst
diff --git a/docs/technical_references/enum_implicit_casting.rst b/docs/technical_references/design_docs/enum_implicit_casting.rst
similarity index 100%
rename from docs/technical_references/enum_implicit_casting.rst
rename to docs/technical_references/design_docs/enum_implicit_casting.rst
diff --git a/docs/technical_references/ff_isolation.rst b/docs/technical_references/design_docs/ff_isolation.rst
similarity index 100%
rename from docs/technical_references/ff_isolation.rst
rename to docs/technical_references/design_docs/ff_isolation.rst
diff --git a/docs/technical_references/hardware_abstraction_layer.rst b/docs/technical_references/design_docs/hardware_abstraction_layer.rst
similarity index 99%
rename from docs/technical_references/hardware_abstraction_layer.rst
rename to docs/technical_references/design_docs/hardware_abstraction_layer.rst
index 645426f..b574a3d 100644
--- a/docs/technical_references/hardware_abstraction_layer.rst
+++ b/docs/technical_references/design_docs/hardware_abstraction_layer.rst
@@ -61,7 +61,7 @@
   - There is a non-secure :term:`HAL` that focuses on the mailbox operation API
     for Dual-core topology. For more information about it, please refer to
     :doc:`Mailbox Design in TF-M on Dual-core System
-    </docs/technical_references/dual-cpu/mailbox_design_on_dual_core_system>`.
+    </docs/technical_references/design_docs/dual-cpu/mailbox_design_on_dual_core_system>`.
   - The minimal set of :term:`TF-M` :term:`HAL` is sufficient for Secure
     Partitions by using customized peripheral interfaces. To provide easier
     portability for the Secure Partitions, a Secure Partition :term:`HAL` is
diff --git a/docs/technical_references/design_docs/index.rst b/docs/technical_references/design_docs/index.rst
new file mode 100644
index 0000000..3566e03
--- /dev/null
+++ b/docs/technical_references/design_docs/index.rst
@@ -0,0 +1,13 @@
+Design documents
+================
+
+.. toctree::
+    :maxdepth: 2
+    :glob:
+
+    */index
+    *
+
+--------------
+
+*Copyright (c) 2021, Arm Limited. All rights reserved.*
diff --git a/docs/technical_references/media/hal_structure.png b/docs/technical_references/design_docs/media/hal_structure.png
similarity index 100%
rename from docs/technical_references/media/hal_structure.png
rename to docs/technical_references/design_docs/media/hal_structure.png
Binary files differ
diff --git a/docs/technical_references/media/symmetric_initial_attest/attest_token_finish.png b/docs/technical_references/design_docs/media/symmetric_initial_attest/attest_token_finish.png
similarity index 100%
rename from docs/technical_references/media/symmetric_initial_attest/attest_token_finish.png
rename to docs/technical_references/design_docs/media/symmetric_initial_attest/attest_token_finish.png
Binary files differ
diff --git a/docs/technical_references/media/symmetric_initial_attest/attest_token_start.png b/docs/technical_references/design_docs/media/symmetric_initial_attest/attest_token_start.png
similarity index 100%
rename from docs/technical_references/media/symmetric_initial_attest/attest_token_start.png
rename to docs/technical_references/design_docs/media/symmetric_initial_attest/attest_token_start.png
Binary files differ
diff --git a/docs/technical_references/media/symmetric_initial_attest/ia_service_flow.png b/docs/technical_references/design_docs/media/symmetric_initial_attest/ia_service_flow.png
similarity index 100%
rename from docs/technical_references/media/symmetric_initial_attest/ia_service_flow.png
rename to docs/technical_references/design_docs/media/symmetric_initial_attest/ia_service_flow.png
Binary files differ
diff --git a/docs/technical_references/media/symmetric_initial_attest/iat_decode.png b/docs/technical_references/design_docs/media/symmetric_initial_attest/iat_decode.png
similarity index 100%
rename from docs/technical_references/media/symmetric_initial_attest/iat_decode.png
rename to docs/technical_references/design_docs/media/symmetric_initial_attest/iat_decode.png
Binary files differ
diff --git a/docs/technical_references/media/symmetric_initial_attest/overall_diagram.png b/docs/technical_references/design_docs/media/symmetric_initial_attest/overall_diagram.png
similarity index 100%
rename from docs/technical_references/media/symmetric_initial_attest/overall_diagram.png
rename to docs/technical_references/design_docs/media/symmetric_initial_attest/overall_diagram.png
Binary files differ
diff --git a/docs/technical_references/media/tfm_crypto_design.png b/docs/technical_references/design_docs/media/tfm_crypto_design.png
similarity index 100%
rename from docs/technical_references/media/tfm_crypto_design.png
rename to docs/technical_references/design_docs/media/tfm_crypto_design.png
Binary files differ
diff --git a/docs/technical_references/profiles/index.rst b/docs/technical_references/design_docs/profiles/index.rst
similarity index 100%
rename from docs/technical_references/profiles/index.rst
rename to docs/technical_references/design_docs/profiles/index.rst
diff --git a/docs/technical_references/profiles/tfm_profile_large.rst b/docs/technical_references/design_docs/profiles/tfm_profile_large.rst
similarity index 98%
rename from docs/technical_references/profiles/tfm_profile_large.rst
rename to docs/technical_references/design_docs/profiles/tfm_profile_large.rst
index 45e51f4..d59ae61 100644
--- a/docs/technical_references/profiles/tfm_profile_large.rst
+++ b/docs/technical_references/design_docs/profiles/tfm_profile_large.rst
@@ -436,9 +436,9 @@
 Reference
 *********
 
-.. [1] :doc:`Trusted Firmware-M Profile Small Design </docs/technical_references/profiles/tfm_profile_small>`
+.. [1] :doc:`Trusted Firmware-M Profile Small Design </docs/technical_references/design_docs/profiles/tfm_profile_small>`
 
-.. [2] :doc:`Trusted Firmware-M Profile Medium Design </docs/technical_references/profiles/tfm_profile_medium>`
+.. [2] :doc:`Trusted Firmware-M Profile Medium Design </docs/technical_references/design_docs/profiles/tfm_profile_medium>`
 
 .. [3] `PSA Certified Level 3 Lightweight Protection Profile <https://www.psacertified.org/app/uploads/2020/12/JSADEN009-PSA_Certified_Level_3_LW_PP-1.0-BET02.pdf>`_
 
@@ -446,9 +446,9 @@
 
 .. [5] `The Transport Layer Security (TLS) Protocol Version 1.2 <https://tools.ietf.org/html/rfc5246>`_
 
-.. [6] :doc:`Physical attack mitigation in Trusted Firmware-M </docs/technical_references/tfm_physical_attack_mitigation>`
+.. [6] :doc:`Physical attack mitigation in Trusted Firmware-M </docs/technical_references/design_docs/tfm_physical_attack_mitigation>`
 
-.. [7] :doc:`Crypto design </docs/technical_references/tfm_crypto_design>`
+.. [7] :doc:`Crypto design </docs/technical_references/design_docs/tfm_crypto_design>`
 
 .. [8] :doc:`ITS integration guide </docs/integration_guide/services/tfm_its_integration_guide>`
 
diff --git a/docs/technical_references/profiles/tfm_profile_medium.rst b/docs/technical_references/design_docs/profiles/tfm_profile_medium.rst
similarity index 99%
rename from docs/technical_references/profiles/tfm_profile_medium.rst
rename to docs/technical_references/design_docs/profiles/tfm_profile_medium.rst
index 6b384c7..5bc4d57 100644
--- a/docs/technical_references/profiles/tfm_profile_medium.rst
+++ b/docs/technical_references/design_docs/profiles/tfm_profile_medium.rst
@@ -470,7 +470,7 @@
 
 .. [RFC7925] `Transport Layer Security (TLS) / Datagram Transport Layer Security (DTLS) Profiles for the Internet of Things <https://tools.ietf.org/html/rfc7925>`_
 
-.. [PROFILE-S] :doc:`Trusted Firmware-M Profile Small Design </docs/technical_references/profiles/tfm_profile_small>`
+.. [PROFILE-S] :doc:`Trusted Firmware-M Profile Small Design </docs/technical_references/design_docs/profiles/tfm_profile_small>`
 
 .. [RFC7252] `The Constrained Application Protocol (CoAP) <https://tools.ietf.org/html/rfc7252>`_
 
@@ -478,7 +478,7 @@
 
 .. [RFC7251] `AES-CCM Elliptic Curve Cryptography (ECC) Cipher Suites for TLS <https://tools.ietf.org/html/rfc7251>`_
 
-.. [CRYPTO-DESIGN] :doc:`Crypto design </docs/technical_references/tfm_crypto_design>`
+.. [CRYPTO-DESIGN] :doc:`Crypto design </docs/technical_references/design_docs/tfm_crypto_design>`
 
 .. [ITS-INTEGRATE] :doc:`ITS integration guide </docs/integration_guide/services/tfm_its_integration_guide>`
 
diff --git a/docs/technical_references/profiles/tfm_profile_small.rst b/docs/technical_references/design_docs/profiles/tfm_profile_small.rst
similarity index 99%
rename from docs/technical_references/profiles/tfm_profile_small.rst
rename to docs/technical_references/design_docs/profiles/tfm_profile_small.rst
index 17f6f49..51d78f2 100644
--- a/docs/technical_references/profiles/tfm_profile_small.rst
+++ b/docs/technical_references/design_docs/profiles/tfm_profile_small.rst
@@ -636,9 +636,9 @@
 
 .. [8] `PSA Attestation API 1.0 (ARM IHI 0085) <https://developer.arm.com/-/media/Files/pdf/PlatformSecurityArchitecture/Implement/IHI0085-PSA_Attestation_API-1.0.2.pdf?revision=eef78753-c77e-4b24-bcf0-65596213b4c1&la=en&hash=E5E0353D612077AFDCE3F2F3708A50C77A74B2A3>`_
 
-.. [9] :doc:`Secure boot </docs/technical_references/tfm_secure_boot>`
+.. [9] :doc:`Secure boot </docs/technical_references/design_docs/tfm_secure_boot>`
 
-.. [10] :doc:`Crypto design </docs/technical_references/tfm_crypto_design>`
+.. [10] :doc:`Crypto design </docs/technical_references/design_docs/tfm_crypto_design>`
 
 .. [11] :doc:`TF-M build instruction </docs/technical_references/instructions/tfm_build_instruction>`
 
diff --git a/docs/technical_references/ps_key_management.rst b/docs/technical_references/design_docs/ps_key_management.rst
similarity index 100%
rename from docs/technical_references/ps_key_management.rst
rename to docs/technical_references/design_docs/ps_key_management.rst
diff --git a/docs/technical_references/secure_boot_hw_key_integration.rst b/docs/technical_references/design_docs/secure_boot_hw_key_integration.rst
similarity index 100%
rename from docs/technical_references/secure_boot_hw_key_integration.rst
rename to docs/technical_references/design_docs/secure_boot_hw_key_integration.rst
diff --git a/docs/technical_references/secure_boot_rollback_protection.rst b/docs/technical_references/design_docs/secure_boot_rollback_protection.rst
similarity index 100%
rename from docs/technical_references/secure_boot_rollback_protection.rst
rename to docs/technical_references/design_docs/secure_boot_rollback_protection.rst
diff --git a/docs/technical_references/secure_enclave_solution.rst b/docs/technical_references/design_docs/secure_enclave_solution.rst
similarity index 100%
rename from docs/technical_references/secure_enclave_solution.rst
rename to docs/technical_references/design_docs/secure_enclave_solution.rst
diff --git a/docs/technical_references/source_structure.rst b/docs/technical_references/design_docs/source_structure.rst
similarity index 100%
rename from docs/technical_references/source_structure.rst
rename to docs/technical_references/design_docs/source_structure.rst
diff --git a/docs/technical_references/stateless_rot_service.rst b/docs/technical_references/design_docs/stateless_rot_service.rst
similarity index 100%
rename from docs/technical_references/stateless_rot_service.rst
rename to docs/technical_references/design_docs/stateless_rot_service.rst
diff --git a/docs/technical_references/symmetric_initial_attest.rst b/docs/technical_references/design_docs/symmetric_initial_attest.rst
similarity index 99%
rename from docs/technical_references/symmetric_initial_attest.rst
rename to docs/technical_references/design_docs/symmetric_initial_attest.rst
index b53ab3c..c139d64 100644
--- a/docs/technical_references/symmetric_initial_attest.rst
+++ b/docs/technical_references/design_docs/symmetric_initial_attest.rst
@@ -588,7 +588,7 @@
 
 .. [1] `PSA Attestation API 1.0 (ARM IHI 0085) <https://developer.arm.com/-/media/Files/pdf/PlatformSecurityArchitecture/Implement/IHI0085-PSA_Attestation_API-1.0.2.pdf?revision=eef78753-c77e-4b24-bcf0-65596213b4c1&la=en&hash=E5E0353D612077AFDCE3F2F3708A50C77A74B2A3>`_
 
-.. [2] :doc:`Trusted Firmware-M Profile Small Design </docs/technical_references/profiles/tfm_profile_small>`
+.. [2] :doc:`Trusted Firmware-M Profile Small Design </docs/technical_references/design_docs/profiles/tfm_profile_small>`
 
 .. [3] :doc:`Initial Attestation Service Integration Guide </docs/integration_guide/services/tfm_attestation_integration_guide>`
 
diff --git a/docs/technical_references/tfm_code_generation_with_jinja2.rst b/docs/technical_references/design_docs/tfm_code_generation_with_jinja2.rst
similarity index 100%
rename from docs/technical_references/tfm_code_generation_with_jinja2.rst
rename to docs/technical_references/design_docs/tfm_code_generation_with_jinja2.rst
diff --git a/docs/technical_references/tfm_cooperative_scheduling_rules.rst b/docs/technical_references/design_docs/tfm_cooperative_scheduling_rules.rst
similarity index 100%
rename from docs/technical_references/tfm_cooperative_scheduling_rules.rst
rename to docs/technical_references/design_docs/tfm_cooperative_scheduling_rules.rst
diff --git a/docs/technical_references/tfm_crypto_design.rst b/docs/technical_references/design_docs/tfm_crypto_design.rst
similarity index 100%
rename from docs/technical_references/tfm_crypto_design.rst
rename to docs/technical_references/design_docs/tfm_crypto_design.rst
diff --git a/docs/technical_references/tfm_fwu_service.rst b/docs/technical_references/design_docs/tfm_fwu_service.rst
similarity index 100%
rename from docs/technical_references/tfm_fwu_service.rst
rename to docs/technical_references/design_docs/tfm_fwu_service.rst
diff --git a/docs/technical_references/tfm_its_512_flash.rst b/docs/technical_references/design_docs/tfm_its_512_flash.rst
similarity index 100%
rename from docs/technical_references/tfm_its_512_flash.rst
rename to docs/technical_references/design_docs/tfm_its_512_flash.rst
diff --git a/docs/technical_references/tfm_its_service.rst b/docs/technical_references/design_docs/tfm_its_service.rst
similarity index 100%
rename from docs/technical_references/tfm_its_service.rst
rename to docs/technical_references/design_docs/tfm_its_service.rst
diff --git a/docs/technical_references/tfm_log_system_design_document.rst b/docs/technical_references/design_docs/tfm_log_system_design_document.rst
similarity index 100%
rename from docs/technical_references/tfm_log_system_design_document.rst
rename to docs/technical_references/design_docs/tfm_log_system_design_document.rst
diff --git a/docs/technical_references/tfm_non_secure_client_management.rst b/docs/technical_references/design_docs/tfm_non_secure_client_management.rst
similarity index 100%
rename from docs/technical_references/tfm_non_secure_client_management.rst
rename to docs/technical_references/design_docs/tfm_non_secure_client_management.rst
diff --git a/docs/technical_references/tfm_ns_client_identification.rst b/docs/technical_references/design_docs/tfm_ns_client_identification.rst
similarity index 100%
rename from docs/technical_references/tfm_ns_client_identification.rst
rename to docs/technical_references/design_docs/tfm_ns_client_identification.rst
diff --git a/docs/technical_references/tfm_partition_and_service_design_document.rst b/docs/technical_references/design_docs/tfm_partition_and_service_design_document.rst
similarity index 100%
rename from docs/technical_references/tfm_partition_and_service_design_document.rst
rename to docs/technical_references/design_docs/tfm_partition_and_service_design_document.rst
diff --git a/docs/technical_references/tfm_physical_attack_mitigation.rst b/docs/technical_references/design_docs/tfm_physical_attack_mitigation.rst
similarity index 100%
rename from docs/technical_references/tfm_physical_attack_mitigation.rst
rename to docs/technical_references/design_docs/tfm_physical_attack_mitigation.rst
diff --git a/docs/technical_references/tfm_psa_inter_process_communication.rst b/docs/technical_references/design_docs/tfm_psa_inter_process_communication.rst
similarity index 100%
rename from docs/technical_references/tfm_psa_inter_process_communication.rst
rename to docs/technical_references/design_docs/tfm_psa_inter_process_communication.rst
diff --git a/docs/technical_references/tfm_secure_boot.rst b/docs/technical_references/design_docs/tfm_secure_boot.rst
similarity index 100%
rename from docs/technical_references/tfm_secure_boot.rst
rename to docs/technical_references/design_docs/tfm_secure_boot.rst
diff --git a/docs/technical_references/tfm_secure_irq_handling.rst b/docs/technical_references/design_docs/tfm_secure_irq_handling.rst
similarity index 100%
rename from docs/technical_references/tfm_secure_irq_handling.rst
rename to docs/technical_references/design_docs/tfm_secure_irq_handling.rst
diff --git a/docs/technical_references/tfm_secure_partition_interrupt_handling.rst b/docs/technical_references/design_docs/tfm_secure_partition_interrupt_handling.rst
similarity index 98%
rename from docs/technical_references/tfm_secure_partition_interrupt_handling.rst
rename to docs/technical_references/design_docs/tfm_secure_partition_interrupt_handling.rst
index 79dea0c..f58fb96 100644
--- a/docs/technical_references/tfm_secure_partition_interrupt_handling.rst
+++ b/docs/technical_references/design_docs/tfm_secure_partition_interrupt_handling.rst
@@ -40,7 +40,7 @@
     ]}
 
 See
-:doc:`secure IRQ handling </docs/technical_references/tfm_secure_irq_handling>`
+:doc:`secure IRQ handling </docs/technical_references/design_docs/tfm_secure_irq_handling>`
 for further information on IRQ source and signal.
 
 Partition ISR function
diff --git a/docs/technical_references/tfm_secure_partition_runtime_library.rst b/docs/technical_references/design_docs/tfm_secure_partition_runtime_library.rst
similarity index 100%
rename from docs/technical_references/tfm_secure_partition_runtime_library.rst
rename to docs/technical_references/design_docs/tfm_secure_partition_runtime_library.rst
diff --git a/docs/technical_references/tfm_uniform_secure_service_signature.rst b/docs/technical_references/design_docs/tfm_uniform_secure_service_signature.rst
similarity index 100%
rename from docs/technical_references/tfm_uniform_secure_service_signature.rst
rename to docs/technical_references/design_docs/tfm_uniform_secure_service_signature.rst
diff --git a/docs/technical_references/index.rst b/docs/technical_references/index.rst
index b98df23..eabc0e1 100644
--- a/docs/technical_references/index.rst
+++ b/docs/technical_references/index.rst
@@ -5,11 +5,9 @@
     :maxdepth: 2
     :titlesonly:
     :glob:
-    :numbered:
 
     */index
     /tools/index
-    *
 
 --------------
 
diff --git a/docs/technical_references/index.rst.in b/docs/technical_references/index.rst.in
deleted file mode 100644
index b5cf149..0000000
--- a/docs/technical_references/index.rst.in
+++ /dev/null
@@ -1,30 +0,0 @@
-Design Documents
-================
-
-.. toctree::
-    :maxdepth: 1
-    :caption: Accepted design documents
-    :glob:
-    :numbered:
-
-    @ACCEPTED_DD_LIST@
-
-.. toctree::
-    :maxdepth: 1
-    :caption: Draft design documents
-    :glob:
-    :numbered:
-
-    @DRAFT_DD_LIST@
-
-.. toctree::
-    :maxdepth: 1
-    :caption: Rejected design documents
-    :glob:
-    :numbered:
-
-    @REJECTED_DD_LIST@
-
---------------
-
-*Copyright (c) 2019, Arm Limited. All rights reserved.*
diff --git a/docs/technical_references/instructions/run_tfm_examples_on_arm_platforms.rst b/docs/technical_references/instructions/run_tfm_examples_on_arm_platforms.rst
index 965d3e9..256147f 100644
--- a/docs/technical_references/instructions/run_tfm_examples_on_arm_platforms.rst
+++ b/docs/technical_references/instructions/run_tfm_examples_on_arm_platforms.rst
@@ -4,7 +4,7 @@
 Instructions for how to run TF-M and example test application on Arm platforms.
 
 Follow :doc:`build instruction <tfm_build_instruction>` to build the binaries.
-Follow :doc:`secure boot </docs/technical_references/tfm_secure_boot>` to build the
+Follow :doc:`secure boot </docs/technical_references/design_docs/tfm_secure_boot>` to build the
 binaries with or without BL2 bootloader.
 
 ****************************************************************
@@ -562,7 +562,7 @@
 Firmware upgrade and image validation with BL2 bootloader
 =========================================================
 High level operation of BL2 bootloader and instructions for testing firmware
-upgrade is described in :doc:`secure boot </docs/technical_references/tfm_secure_boot>`.
+upgrade is described in :doc:`secure boot </docs/technical_references/design_docs/tfm_secure_boot>`.
 
 --------------