Book excerpt: Interested readers will find here the thoroughly refereed post-proceedings of the International Workshop of Sequences, Subsequences and Consequences, SSC 2007, held in Los Angeles, USA, in 2007. The 16 revised invited full papers and one revised contributed paper are presented together with three keynote lectures and were carefully reviewed and selected for the book. The theory of sequences has found practical applications in many areas of coded communications and in cryptography.