/*! \page page_usage Usage Manual Note: Once built, check out <a href="http://gnuradio.org" target="_blank">gnuradio.org</a> for more tutorials on using the software system and examples. <b>Getting Started</b> \li \subpage build_guide - Installation notes, dependencies etc. \li \subpage page_exploring_gnuradio \li \subpage page_operating_fg <b>Metadata and Messages</b> \li \subpage page_pmt \li \subpage page_metadata \li \subpage page_msg_passing \li \subpage page_stream_tags \li \subpage page_tagged_stream_blocks <b>Advanced Development Topics</b> \li \subpage page_logger \li \subpage page_perf_counters \li \subpage page_affinity \li \subpage page_prefs <b>Signal Processing and Digital Communications</b> \li \subpage page_pfb \li \subpage page_ofdm \li \subpage page_packet_data <b>Out-of-tree Modules</b> \li \subpage page_oot_config <b>VOLK</b> \li \subpage volk_guide - How to incorporate and use VOLK in GNU Radio blocks */