Welcome to CRTS 2009! Welcome to the second Workshop on Compositional Theory and Technology for Real-Time Embedded Systems (CRTS). This workshop (CRTS 2009) provides a forum for researchers and technologists to discuss the state-of-the-art, present their work and contributions, and set future directions in compositional technology for real-time embedded systems. The technical program of CRTS 2009 will consist of invited talks and paper presentations. CRTS 2009 will be held in conjunction with IEEE RTSS 2009 at Washington, D.C., USA, on December 1, 2009. What's New Nov 16, 2009: Final program is available. Here October 28, 2009: Preliminary program is available New submission deadline is October 2, 2009: final extension September 9, 2009: Submission deadline is extended to September 25, 2009 August 15, 2009: Submission site is now open (see below) June 1, 2009: Workshop website is available Paper Submission We encourage the submission of research papers that present novel ideas in compositional technology for real-time systems. We also encourage the submission of position papers that survey the state-of-the-art, present work-in-progress, and discuss open issues. Submissions should be no more than 8 pages in two-column, single-space, 10pt format (for LaTeX style file see ftp://pubftp.computer.org/Press/Outgoing/proceedings/IEEE_CS_Latex8.5x11x2.zip). All figures and references must fit within this limit - papers that deviate from these requirements will not be reviewed. All submissions should be in PDF file format. Submissions should be sent through the paper submission system on easychair located here: http://www.easychair.org/conferences/?conf=crts09. Submission of the paper implies that should the paper be accepted, at least one of the authors will register and present the paper at the workshop. For further details of the workshop, please consult the following website: http://www.artist-embedded.org/artist/CRTS-2009.html