app-admin
app-benchmarks
app-doc
app-portage
app-text
app-vim
dev-cpp
dev-java
dev-lang
dev-libs
dev-ml
dev-perl
dev-python
dev-tcltk
dev-tex
dev-util
media-gfx
media-libs
net-firewall
net-ftp
net-misc
perl-core
sci-astronomy
sci-biology
sci-chemistry
sci-electronics
sci-geosciences
sci-libs
sci-mathematics
sci-misc
sci-physics
sci-visualization
sys-cluster
sys-devel
sys-fs
virtual
www-apps
x11-libs