Suggested citation and version history for: Boore, David M., 2008, revised 2009, TSPP; a collection of FORTRAN programs for processing and manipulating time series: U.S. Geological Survey, Open-File Report 2008-1111, v. 2.0, 52 p. [http://pubs.usgs.gov/of/2008/1111/]. Version 2.0, December 10, 2009 This version contains a few new programs (such as smc2psa_rot_gmrot.for and smc_psa_vs_r_vs30_adjust.for), as well as revised (and renamed, in the case of smc_psa_vs_r.for) versions of several of the programs. I have also given the url for what will be my new home page, from which the software can be obtained (the migration to that web site is in progress). Version 1.6, June 30, 2009 This version contains revised versions of a number of the programs, as well as a useful new program--filt_plot.for. A new sample session (Session 3) is included to highlight the use of this new program in choosing low-cut filter corner frequencies. Version 1.2, June 11, 2008 Initial release online at http://pubs.usgs.gov/of/2008/1111/