+* packagegroup-agl-image-minimal
+
+ packagegroup-agl-core-automotive.bb
+ packagegroup-agl-core-connectivity.bb
+ packagegroup-agl-core-graphics.bb
+ packagegroup-agl-core-kernel.bb
+ packagegroup-agl-core-multimedia.bb
+ packagegroup-agl-core-navi-lbs.bb
+ packagegroup-agl-core-os-commonlibs.bb
+ packagegroup-agl-core-security.bb
+ packagegroup-agl-core-speech-services.bb
+
+These are for making image ``agl-image-minimal`` which is small image just
+capable of allowing a device to boot.
+
+Subsystem should maintain packagegroup-agl-core-[subsystem].bb which should
+hold sufficient packages to build ``agl-image-minimal``.
+
+* packagegroup-agl-image-ivi
+
+ packagegroup-agl-ivi-automotive.bb
+ packagegroup-agl-ivi-connectivity.bb
+ packagegroup-agl-ivi-graphics.bb
+ packagegroup-agl-ivi-kernel.bb
+ packagegroup-agl-ivi-multimedia.bb
+ packagegroup-agl-ivi-navi-lbs.bb
+ packagegroup-agl-ivi-os-commonlibs.bb
+ packagegroup-agl-ivi-security.bb
+ packagegroup-agl-ivi-speech-services.bb
+
+These are for making image ``agl-image-ivi`` which is baseline for the profiles
+of AGL distro. 'Baseline' means Service Layer and Operating System Layer defined
+in AGL Spec v1.0.
+
+* packagegroup-agl-test.bb
+
+Additional tools used in QA tests (for agl-image*-qa).
+
+* packagegroup-ivi-common*
+
+ packagegroup-ivi-common-core-automotive.bb
+ packagegroup-ivi-common-core.bb
+ packagegroup-ivi-common-core-connectivity.bb
+ packagegroup-ivi-common-core-graphics.bb
+ packagegroup-ivi-common-core-kernel.bb
+ packagegroup-ivi-common-core-multimedia.bb
+ packagegroup-ivi-common-core-navi-lbs.bb
+ packagegroup-ivi-common-core-os-commonlibs.bb
+ packagegroup-ivi-common-core-security.bb
+ packagegroup-ivi-common-core-speech-services.bb
+ packagegroup-ivi-common-test.bb
+
+These are for picking up some packages from upstreams like GENIVI/Tizen/Others.
+The layer of ``meta-ivi-common`` has no image to build, all packagegroups are
+aggregated to ``packagegroup-ivi-common-core' and it is included by images,
+``agl-image-ivi.bb`` and ``agl-demo-platform.bb``.
+
+## Supported Machines
+
+See [docs.automotivelinux.org](http://docs.automotivelinux.org)