Discogs.com: Discogs - Database and Marketplace for Music on Vinyl, CD, Cassette, MP3 and More
Buy rare and hard to find music on vinyl records and used CDs from thousands of online record stores. Manage your music collection with a detailed discography on rock, electronic, hip hop, classical and other popular and obscure music genres.
Scientific physics forums for professionals and students to discuss serious issues and topics regarding physics in theory, practice, study and reality. Students can also find help for homework and career perspectives