biocLite Installs/updates Bioconductor/CRAN packages. chooseBioCmirror lets you choose from a list of all
public Bioconductor mirror URLs.
chooseCRANmirror lets you choose from a list of all
public CRAN mirror URLs.
biocinstallRepos returns the Bioconductor and CRAN
repositories used by biocLite.
install.packages installs the packages themselves.